I agree with everything except 1 and 2. Epic makes too much $$$ licensing their engines to be bought, and SEGA just said they'd never be bought. Possibly Tecmo, though.
Obviously Halo Wars will be there, and possibly Chronicles, but a THIRD game in one series would be horrible for them, as it would further the idea that Xbox is 'the Halo console', and would also confuse people.
As for my other predictions:
Conker Can't Cry
The rumoured 'Avatars'
A couple of new, big games, some of which are from franchises that we completely forgot about but love.