Manny has one of the belt so he can either face another champion or defend it, simply as that.
It's beyond Manny's control now, it's the promoters job, but whatever or whoever wins this fight, It's not Manny's concern, besides, we all know that both of them are under Top Rank and Manny is on the other side of the fence now, under Al Haymon, so much likely Manny will face Spence, Danny Garcia or Porter.