I doubtful that the Governor will trust Merle again. Merle has lied to the Governor twice - the prison can't be taken, and Michionne is dead. Both lies have resulted in the town being attacked, the death of Penny, and erosion in the faith of the people for their Governor.
I am tired of the shtick of black man in, black man out.
I am anticipating the latter half of this season.