Ranked Win Bonuses

If you look at your ranked stats it tells you how many champions you have wins in ranked on... I am currently sitting at 67 of the 127 champions with wins in ranked. Have you guys thought about implementing a bonus for getting a win on EVERY champion in ranked? I could see the plus and minus sides of this. One it encourages people to try new champions and would overall expand the number of champions you would see in an average day but at the same time people would pick karma having no idea how to play her in hopes they get carried.