Aion's pvp combat was interesting. And since we are getting Arcanist/Summoner it reminds me of that game even more (Book + Pet + Magic) minus the flying. The only PvP MMO I played that had collision was Warhammer. And that game didn't fare to well.

Who knows, maybe in the future (Maybe a game expansion, Yoshi-P states that their maybe new content for flight/sky) we will have some sort of flying/combat or PvE raids.

Didn't Yoshi say that there will be public events as well? Maybe their PvP related.