i honestly think the new pirate skins aren't really needed but if they are coming out i think they should've made at least a set of 5 dino skins theres already 3 but i thought of a cool concept. like a triceratops riding sejuani i can't really think of a 5th but i just think the dino concept was pretty cool.
Tamur1 voteshttp://boards.na.leagueoflegends.com/en/c/skin-champion-concepts/8jEHYEbd-prehistoric-rengar ok not a dino but still
MayorOfAvabruck1 votesoh yea thats nice too and maybe also like nidalee turning into a sabertooth. i think they can also do something with rek sai like some sort of ocean creature
WolfiexLuna1 votesSome champs i imagine could get Prehistoric skins would be: 
and 
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MayorOfAvabruck1 votesyea like rek sai could easily be a Dimetrodon im not sure if you know what that is XD sorry but thats what i see it being shyv could be another pteradon and nami i might have to think for a bit about her
MayorOfAvabruck1 votesThere can even be a maybe pre historic fizz and his ult can be a mosasaur