Even JetBlue itself has announced that it will make a "major news announcement" tomorrow. Seems like too much fanfare for just one new destination.
Any guesses? Here are a few of mine, in no particular order, and not based on ANY factual information whatsoever:
1. JetBlue will open a mid-continent hub/focus city (this is my gut feeling, but who knows)
2. JetBlue will launch international services: Canada, Mexico, D.R., or any combination thereof
3. JetBlue will buy Frontier (not likely, but see #1, above)
4. Richard Branson will take a 25% stake, resulting in some kind of tie-up with Virgin Atlantic
5. JetBlue will add a new aircraft type, either larger (A321 or, as a really long shot, A330) or smaller (A319 or ERJ)