This may end up as the path Bloomberg/Hagel take.
If Bloomberg spends $billion it is possible he could win
As I've been saying for a while, Bloomberg and Hagel can't run on Unity08 together, right now. The rules don't allow two people from the same party to be on the ticket, so I'm guessing that one of them will become an independent.
Bloomberg might switch back to being a Democrat. As some of you might know, Bloomberg changed his party affiliation to run for mayor solely because he stood no chance in the Democratic primary.