I would be very surprised if this happens, but a few things make it seem possible.
A) Even though Accenture dropped him, I don't know if that pres release read "forever & ever." And if he wants to start rehabbing his image with former sponsors (i.e. potential future sponsors), showing up to help their event would be a good starting point. Especially in an event where Accenture's other main draw (Phil) has already withdrawn.
B) If my game is rusty, I'd rather play Match Play than Stroke Play. I'd rather try to beat one guy at a time than have to compete against an entire field.
C) After a 6 weeks of a "Tiger-less" tour, the viewing public will be primed for the "Thank God You're Here" reaction, especially if Phil's not there
D) The first event will be a circus - and even though the Masters may be more controlled (from a press standpoint), I think he may want the initial experience to be done with before he gets to Augusta.
Hope I didn't regurgitate the article - I just added some comments off the top of my head before following the link.