Obviously subject to change as get closer to release, classes get tweaked and people actually play the classes and find out they weren't what they thought.
Destruction would be Orc Choppa. I was told this is basically what I always wanted the WoW Warrior to be, an armored DPS machine. So I think this will be perfect for me, as I loathed tanking but loved chopping things to pieces.
Order would be Empire Witch Hunter. Something about this class just seems **** cool. Also, the Soloman Kane look kicks ass.