It will be mostly bruisers and tanks with a mixed bag of others just like treeline I imagine (different mixed bag but a mixed bag nonetheless). I imagine TF, Nocturne, Nidalee and other champions with high mobility will be invaluable for their map presence. Ashe and other similar champs who need farm are gonna be useless. I imagine based on the spacious lanes and clearings shown in the video the Anivia's wall will be significantly less usefull.
Expect less armor and mr items, so less problems with tanky champs than on TT.