A rematch would be another entertaining night but there is no need to it. Diaz did the best he could.
Not needed, he's got limited mileage left all his fights from this point on are ticking at his expiration date.
Diaz had the best chance to beat him the first time and was doing well and still was beaten. Best if JMM moves on to different challenges. Diaz is not in his class. It was an interesting and good fight.
No need for a rematch . . . it will be the same result. Diaz' only chance is to crowd JMM to take him out of his comfort zone . . . well he failed. I don't see Diaz out boxing JMM . . . so no win situation for DIAZ.