It would be interesting to know if there are plans for special runes or masteries usable only on Dominion maps.

I would assume that the fortify and teleport masteries would have a second effect for Dominion, although I have NO idea what that would be...

I remember reading somewhere that they had new masteries for it, don't remember where though.

There are masteries that revolve around summoner spells that won't exist, around neutral creeps that don't exist. At the same time there should be masteries about promote and garrison, masteries about capturing/channeling, so even if they don't give us completely new trees, there should be some big changes about the current ones.

i really would want to, something like quins that increase capture speed, or masteries in utility tree, but i doubt it.