Christmas already happened..u have to wait until next year to submit your wish list!
I think you are right about the MW title being defending in June at the Brazil PPV, which will have Big Nog vs Werdum on it as well. Bisping if he wins, Weidman should Bisping lose, Rockhold needs a tune-up or two, could face Costa sometime in the spring.
The HW will happen by July, the Memorial day weekend (May 25) may be cutting it close for a HW bout (3.5 months) is a quick turn around in a division with shoulder, back, knee, and broken hand injuries.
LW Title: Bendo vs Pettis (If he wins) or Melendez (If Pettis loses) is on deck as well,
Don't forget a Fox card on April 20
As for GSP? he won't fight Marquardt in 2013, Marquadt may or may not have 1 title defense after jan 12, is a training partner of GSP's (close) and July is too quick for GSP with September being the Toronto card...and Dana promising to make up to the people of Calgary, anything is possible.
I think Ben will fight again on FOX, they might do him vs. Melendez in May since that's a UFC vs. SF fight with the Flyweight title as the co-main.