What other system sellers does Microsoft have until Natal?

[iWarMachine]

let's see, the ps3 still has some great sellers coming out...

Gran Turismo 5...it's huge WorldWide.
Final Fantasy XIII...Japan is the place where it sells best, so we can expect a system seller right here.
God Of War 3...believe me, this one will be really big in NA and maybe in EU.

New IPs (possible system sellers).. Agent, Heavy Rain.
Also we've the PS Motion Controller (with a good advertising it could be big hit.)

now 360...

Splinter Cell: Conviction, is not as big as any of the ps3 system sellers, but it'll be like uncharted.

..
...

yep, that's it.

New IPs (possible system sellers)... Alan Wake.

but then, we've natal, fable 3, halo:reach & probably gears 3.