For example
1. Will they alter the game engine a lot? Will they do a major technological revamp? Will it be able to do a lot more for developers to play around (e.g. vr or ai or multiscreen/consoles/mobile)?
2. Will they alter the way the game itself is promoted to new players? E.g. will it be renamed to just "World of Warcraft"(no expansions)? Will it have an MS Launcher?
3. Will they affect the lore at all? Will whatever expansion Blizzard had planned 2 years ago go as planned next year? Are they going to make another movie?