Someone mind filling me in?

Offhand:
Eve, Xin Zhao, and Twitch remake. Eve is easier to use/far more viable now (hate spike is ranged, she's a "stealth" champ that is stealthed when nobody is looking with a new passive, etc), Twitch is just as viable as before and his remake amounts to a bit of a buff to his ult, Xin is very viable and was borderline OP until they changed him a little more in the last patch (his new passive marks a champ as "challenged," ult is basically Janna's ult now but doesn't knock away the challenged champ). Supposedly there's an Orianna remake in the works next, but that hasn't happened yet.
Zyra's a new champ, she's bursty as hell and also supports very well, supposedly going to get hit with the nerf stick very soon. Ahri's got a newish skin out, which means she's going to probably get nerfed soon too if the usual nice skin -> nerf pattern follows.
Diana's new as of like the last day or so, haven't had a chance to see or play her but she's a great jungler apparently.
Mummy got "nerfed" with his AP ratios; he's more of a tank now than anything.

Eve's decent now, though she's "Jungle or Bust", not worth taking in any lane.

Has a shield for an ultimate, she goes normal jungle runes as far as I know, builds kinda tanky-dps though usually.