As the title states, what champion would be a must buy for you when he/she/it would've been announced? Solo top? AP Mid? Pure Jungler? New AD Carry?
And of course, what themes would you want for new champions? Gunslinger AD Carry? Ice mage AP caster? Doesn't have to (but can be!) be VERY specific. (Just an overview)
Everyone has their favorites.
Let's see some ideas