main event for year end show?

Looking at the ufc's biggest names, the schedule between now and December and the number of injured/unavailable fighters it appears as if the ufc is going to have a tough time putting together a big year end card. Looking at the list of top draws:

Lesnar: Fighting in November, impossible for December.

Machida: Fighting at the end of October. Questionable whether there is enough time for a year end bout.

Anderson Silva: Apparently having surgery and unavailable until the new year.

GSP: Apparently unavailable until February

BJ: Rumoured to be fighting Sanchez at the end of the year. Is this year end main event caliber?