I think he will, assuming the fight unravels in a similar manner to the previous three. That is, if its close (as it likely will be), then Marquez will be given the W. Pac fans will cry robbery and Arum can match them up for a fifth fight! Whoopeee.
If Manny manages to clearly dominate, then Arum will make May vs Manny happen and cash the **** out. At that point, the results are really irrelevant to him.