Everything is possible in MMA. It could be a career killer for Lawler. It's never good even for business point of view. You lose a potential "star fighter".
Example:
Cain, JDS. Fought each other from 2011, 2012, 2013. -.- Killed JDS career.
Weidman, A.Silva. Instant rematch, I see no chance of Silva going for title anymore.
Edgar, Maynard. Maynard lost all the steam after III.
Edgar, Benson. This is the most ridiculous.
Constantly building new fighters for title contention won't do good for the fans. The reason why fighters in the past have huge following is that they were built up slowly. Imagine a title fight involving the same 2 person happen within 1 year. It will be hyped as shit, but long run, it does nothing.
EDIT:
Good example would be Silva Vs Sonnen.
Silva got to defend his belt against 2 fighters between the rematch.
Sonnen got to win 2 more times to build up more hype around himself/his skill.
This is good business and fighter fame building.