As much as I plan to think it's scripted, looks like the emotions are genuine and true.
The punch from Canelo is a hard landing. Caleb Plant receives a cut on his below right eye. It wasn't well defended even it's a predictable move by Canelo. There will be lots of the same punches that Plant will expect to receive in the fight. Not just a cut on his right eye but maybe multiple damages. He better be aware.
Promoters will not take a risk of altercations to attract more sales and hype the fight, it's already hyped with so much news coming up in the last four months it's real and glad that the punch is not that solid to badly hurt Plant, there's already news in UFC where a fight did not push through because the other guy was hurt because of the push he received from his opponent.
Things like this should be avoided if they want to fight they should do it in the ring not in a press conference.