IGN Speculates that the 360's GTA IV Second User Content to debut 6-1-09.

[Squilliam]

Munkeh111 said:

JaggedSac said:
Here are my MS E3 conference thoughts.

Lionhead game reveal. Yep
2 Rare retail game reveals.(KI and PD) Dunno about the games, but yes to Rare games
Perfect Dark on XBLA reveal. Probably
BigGames(recently aquired studio) game reveal. Yep
EPIC game reveal.New game from the studio they aquired.
ODST gameplay reveal. Yep
Motion detecting device reveal. I'm not buying a M$ 1st party motion sensing device
New NXE features reveal. Most likely
More Primetime games reveal. Don't really care
ZuneLive integration reveal. Don't really care, but probable
Crackdown reveal. APB looks about ready for a big reveal.
ZuneHD gaming capabilities reveal. They call the new project the xYz as in somewhere between Xbox and Zune in capabilities.
GTA DLC reveal. Yep
They will go over sales numbers. and we will all think back to how awesome sony made this part of their conference in 2008 using LBP
XNA feature additions. Maybe motion controller API additions. Dunno
Avatar customization kit reveal. I don't really care
Maybe a 360 redesign. I don't think so
That is all I can think of for now.

The only other ones I can think of are a Splinter Cell unveiling, and stagetime for the multiplatform Bioshock 2, Call of Duty Modern Warfare 2 (apparantly it has got the CoD back!) and Lost Planet 2

I got lazy and just edited your thoughts!