Skillswise JMM will be able to hold his own in patches, but there is nothing he brings to the table other than experience that will tip in his favour. Brook is a big strong WW with a sound skillset. He is a well rounded WC fighter. He doesn't really have too many weaknesses and even his chin is good. I can see this fight going one way and that would be a wideish UD for Kell. If Marquez engages too much then he may get stopped. One thing is for sure, Marquez will taste the canvas but will get up due to his heart.
I expect JMM to duck Brook like he ducked Morales, Soto, Rios, Khan and Provodnikov,,... Oh, did I missed something? He's ducking Manny Pacquiao now! And he's completely scared of Mayweather,,... Gosh, everybody wants a piece of both Pacquiao and Mayweather, except him,,...
Don't underestimate INCREDIBLE JUAN.......with Memo's magic potion, BROOK will be torn into pieces. :hat