If you've been following Gamespot's E3 coverage, you may of looked at their hexagonal floor map. If you look at it, you can hover over it and see which games publishers and developers will be showing off this year at E3.
As you can see from above, they have revealed - accidentally we imagine - that Dead or Alive 5 will be shown off here. Of course, we knew nothing of the game before hand, so take this as the announcement.
Furthermore, if you go over to EA's booth, you'll happily see that they'll be showing off Mass Effect 3.