Final Boss Kassadin

I have been wondering what he Final Boss and Arcade peeps would be. Saw there were 5 spots, which develop a whole team. So, for the Arcade we have everything except for a mid laner. I was thinking like.... Talon the Otaku? You know.... Pikachu Hoodie and everything? Since Veigar top is a thing apparently, it came to my mind that Final Boss Kassadin might be cool, thinking of his skill animations and everything.. Im just curious to see what champions are next for the Arcade and Final Boss list, would like to see this actually be skins or something :T