TRMK.org, the sub-zero source for all things Mortal Kombat, has a major exclusive to kung fu kick off the month of Apri:
A fighting gamer's dream has come true as Capcom and Midway have announced a major blockbuster announcement. The two companies have agreed to partner together for Street Fighter vs. Mortal Kombat on Xbox Live Arcade! While Capcom is hard at work at bringing Street Fighter II Hyper Fighting to Xbox Live, Microsoft has acted as an intermediary in order to bring the two companies together to the negotiating table.
Sources deep within Microsoft inform me this game will be sold in a two pack with Barbie: Horse Rally.
Nice work on that screenshot.
Update: Ryan points out that if I'm going to perpetuate annoying April Fools jokes, I should at least link to this Mortal Kombat vs. Streetfighter video.