Microsoft may be unveiling Forza Motorsport 5 at their unveiling of the next-gen console on the 21st May in Redmond, WA as a next-gen title.
This is due to the publisher's new contest where the grand prize winner will earn a seat at Microsoft's E3 press briefing in Los Angeles on the 10th June. The contest requires gamers use the @Turn10 in their tweet, alongside @EA, @Xbox, and @PlayXBLA.
The only confirmed title to be shown off at the 21st May reveal is Activision's Call of Duty: Ghosts. It's possible that Forza 5 will be revealed at the E3 press briefing, since Microsoft has stated that the earlier reveal will be about the hardware for the most part.