The Bosses vs the Arcade skins
With the new release of Riven we almost have a full arcade team, and blitz filling in another spot on the boss team, who's left and what kind of skins can we expect. Just going to throw out my ideas and opinions.
Boss Team roles left- Jungle/Top/ADC
ADC- " Hidden" Boss 
Top- this is kinda tough but i came up with a few ideas, wanting to have a " Raid boss" top laner, meaning extremely strong late game. I could think of SIon, because Nasus and Vlad already have Legendary skins or whatever, there still open for them of course but it wouldn't make much sense to give either of those two another big skin. So skin #1 is "RAID" Boss 
Skin #2 " Raid" Boss 
Idea #3 is keeping a little to the lore and having "Rogue" Boss
who is only after the Hero Arcade Miss Fortune
Jungle- Trying to keep a feeling of Game style, Bonus levels usually come as a surprise and are generally fast paced, take quick reactions and skill/ and can get you AHEAD of the competition IF YOU CAN BEAT THEM.
Skin : " Bonus" Boss 
Arcade Roles: Mid
There has been alot of speculation the arcade mid will be
, and I like the Idea however I'd like to suggest someone else.
Skin: Arcade
Why:
Is a extremely strong anti-mage, having xerath's range keeps him from getting to close to the Final Boss but if he does get trapped can be easily dispatched
That's just my thoughts on maybe how the skins should come out, feedback is always welcome