In other say, combine an existing theme with an champion. Examples:
Wildfire Syndra
Blood Moon Syndra
Cosmic Reaver Xerath
Void Xerath
Infernal Azir
Nutcrackzir
etc...
Let's see the ideas, may be we can guess right a skin!
Sharjo21 votesHand of Noxus 
and Snow Day , where we see a living Sion and a metaphorical/literal snow plow Sion.
Infernal 
where she takes on the form of a demon of vengeance or something.
Chosen of the Spoon 
where she has a huge spoon and is a cook in training.
Haunted 
where he's a stone statue tomb angel kinda thing that's been taken over by plants and now walks among the living.
Oktoberfest 
because I wanna see how they do Sona with an Accordion.
Winterborn 
which I picture as a sort of Freljordian interpretation of Bard, where he's like an iceborn, wields a traditional Freljordian horn and has little ice meeps. Also Mr. Saxo, because that song made me think Bard's look awesome in a tux, with a sax.
Geomancer, Fire keeper, (insert sport here) master, Storm Crafter, Cosmic , I could go on. Just replace what her orbs are made of and you're good for a Syndra skin.
Dragonslayer 
and 
, where Kha'Zix evolved to be a super dragon bug thing, and Rengar had dragon armour. I recon he'd definetly be kicking in that AU, I mean come on, is Rengar gonna miss a chance to hunt dragons?
Some skins for when 
were still alive would be nice too, even though some might be a tad more difficult than others.
I could go on but I feel like you get the jist!
Bârd15 votesRunning back
Brad (Bro )
and 
, but with their outfits swapped
Gauntlet of the 5th age 
Nagakeborous 
Ralanr7 votesUpvote for Bro Bard.
GreenLore13 voteswarring kingdoms &
Azir summoning terracotta soldiers and hecarim being an animated samurai armor/centaur with a naginata.
Fasmodey7 voteswarring kingdoms
http://fc05.deviantart.net/fs38/f/2008/360/6/7/game_design_Eastern_Centaur_by_ilison.jpg
Made, it was a bit hard because of how I gave my seconds to it kappa
Oxbridge4 votesHecarime just got Elderwood. No more skins for him for at least a year.
Enchanté3 votesmhm... Except if its Ahri. She gets a new skin every single fucking year. Even less since Challenger was released on January 2015 and then she gets Academy on August 2015
s0rry m8 I has too much h8 for that prostitute fox
warpenguin5552 voteswell tbh, ahri skins arent hard to make. just think "what do guys find sexy" and boom, theres an ahri skin
Oxbridge1 votesAnd that's exactly why she gets a lot of skins. Everyone likes the whole furry foxgirl motif. It's why Ezreal gets so many skins too.
Enchanté1 votesBut all Ezreal's skins are damn cheap and has no spell effects but Pulsefire. His skins prices are only 520 and 750 (plus 3250), whereas Ahri's are 975s and 750s and all the 975s are equipped with full spell effects (even two of them has new dance animation). Why is it so hard for rito to create other pretty skins for champions just other than Ahri :')
Sukishoo1 votes750 skins are simplistic level, so it doesn't matter if a champion already received a skin that year, they can still get another one if it happens to fall into a 750 theme.
Rebonack10 votesStar Guardian Kog'Maw skin that vomits rainbows.
Trained Dragon Kog'Maw.
Ralanr8 votesI'd like a Vandal Jax skin that looks more like this:
http://pre05.deviantart.net/f0a5/th/pre/f/2015/157/4/5/the_vandals_by_vegacolors-d8wb2nz.jpg
Credit to artist: Vegacolors.
Sukishoo1 votesYes please! Vandal Jax make over!
Teemo or Feedmo7 votesstar guardian urgot
Xeden Beloved6 votes
Seeing for the first time flailing at all the everything all around.
Definitely not Jinx. As in, in a police outfit.
Definitely not Vi. As in, as Jinx is by default.
Young Mind Akin to a school uniform, with a singular lensed eyewear. Do have some curious ideas as to what his abilities could look like too.
And the definitely not series: Wjere Demacians would be Noxian and vice versa. Maybe even for other opposing lands. I like what I did there mhm mhm mhm
LaoBushido5 votesA malzhar skin with particles ( bright one red/ yellow/ orange) so blood moon, forsaken, dragon tamer
Enchanté5 votesArcade 
Frost Thorn 
Wildfire 
Snow Assassin 
Overlord Forte4 votesEmpress / Hextech / Celestial / Secret Boss Syndra
Oxbridge2 votesWe're already getting Snow Day Syndra. No more Syndra skins for the next year.
Fasmodey3 votesWe're already getting Snow Day Syndra. No more Syndra skins for the next year.
Dont be that sure, Darius, Varus, Syndra gap is not that much but still Darius and Varus, each one has 5 skins. Syndra has 4.
Also it's about future skins, doesn't matter if it's not going to be on next year. Future is future, not next year. Let him to send his ideas freely, this thread is only about ideas.
Oxbridge2 votesAgreed. :)
Diananmen Square3 votesGnar did get two skins this year though.
Ironclad Dragon4 votes Battlecast._ Think about it..._
warpenguin5554 votesBlood Moon 
and 
More Star Guardians(They did it with Project so why not?)
Jekyll and Hyde 
Reverse and 
Mongolian Deathworm
(This was real one of my dreams)
Ligerzz3 votesA more colorful skin really. I know she is a demented, evil kind of champion, but she has so many amazing opportunities and concepts that could really look awesome.
Universal Boop3 votesNude Beach
Malicious Metal3 votes
Blood moon; Some crimson, white hues would suit him and the Oni mask circling above a champ during his let would be awesome
Dia de los Muertekaiser; I'd be a cool way to embrace the whole Brazilian Meme and Morde lacks "fun" skins
Superb Villain Mordekaiser; Who wouldn't love him twirling his mustache and wearing a top hat?
Justicar Mordekaiser; A "good guy" Morde skin could be fun^^
Over Innsmouth2 votesNo Battlecast Mordekaiser?
: Metal is perfection.
Malicious Metal1 votesHeck, why not Full metal Mordekaiser? XD
TBakes3 votesLunar Revel 
Deep Terror 
Arcade 
Championship 
ValuedCustomer3 votesOrder of the Eggplant 
TwoD3 votes
Reaper Zed
Sandstorm Zed
Unmasked Zed (you can't not want this to happen lol)
Void Elise
Cyber Elise
Forsaken Kassadin
Overlord Kassadin
Demonblade Yasuo
Blood Moon Yasuo
Fisherman Yasuo
Hitman Talon
Full Metal Talon
Thousand Blades Talon (Ultimate Skin)
Blackheart Ryze
Chaosborn Ryze
The Soulforged2 votesHextech Poppy, but she's being replaced next patch...
Heretic Lunari2 votesOrder of the banana Diana.
UomoAfide2 votesCottontail
Crowe Stalker2 votesAnything 
Okay not not being a Salty Asshole, how about 
or Boss skins? Arcade ? Maybe give a Blood Moon skin?
Bostian2 votesK-9 
Superhero 
Project
Pool Party 
(pool noodle OP)
Artificial Human2 votes
Blight Crystal Sion
Bioforge Sion
Glacial Sion
Forsaken Sion
Oni Trundle
Underworld Trundle
Hip Hop Mordekaiser, his mace looks like a giant spiky microphone and he says something like "I like my weapons how i like my music, Hip and HOP" (ok that sounds kinda weird, im not good at this)
You can see what i mean when you look up: Urban Rivals LAETITIA
Bottom Laner1 votes
Succubus Morgana
Demon Morgana
Fairy Morgana
Knight Hecarim (like the chess piece)
Bellopia1 votesStar Guardian Soraka, I need it.
