I wouldn't say Brookins is a surprise packet. The guy has fought in the WEC before and gave Aldo a decent fight from what I've read. Looked to be one of the strongest wrestlers in the first ep which usually means they will run deep in the competition (unless of course their guillotine defense sucks ).
I think what I meant is that for the first 5 or so episodes you didn't even see him speak... then all of a sudden he suprises everyone, well me anyway , and puts on a great fight.