Bumping the thread to bring an update, due to a media embargo on the showcase we won't be able to get info about the showcase until March 5th. Also when asked by adamj004, BSangel responded "sorry I cant comment on that" which would seem to suggest some validity to the reveal since she did not deny it as you would think she would.
P.S. might I suggest changing the title to "Possible Halo 4 Reveal February 29th"?