No man..... The size comparison is just too fair at a disadvantage.
I can see if this was some Bret Hart vs Yokozuna type differences where they "could" make away for DB to look like he could exploit a weakness. But to Brock, what could DB really do?
Forget the size and power cuz it's no secret Brock is a skyscraper to DB and 10x stronger at worst.
Speed difference and quickness?? Not much.... Brock for a big guy is deceptively fast and DB for a little guy is not one of those traditional speedy cruiserweights like Rey in his prime. So I don't think he could decisively out speed Brock.
Then punishment.... Ok yes.... DB has some nice kicks.... But Brock has shown he can take punishment from all the STRONGEST wrestlers he's faced (all by far way stronger than DB from Show to Henry to Cena), DB doesn't have the power so all his strikes would do would make Brock laugh.
Then the wrestling holds.... Brock would overpower him with ease not to mention Brock has shown he can reverse holds. Also, if Brock was to put DB in a submission, are we supposed to believe when the King of Kings and Worlds Strongest Man couldn't escape now all of a sudden little ol DB can?
Na..... They gotta keep guys that much at a disadvantage away from Brock