Barnett should be a heavy favorite in this match and for good reason. First of all, Cyborg is known for leg attacks but his aren't as good as Dean's, which aren't as good as Barnett's and unlikely to tap Barnett in any case. Second, Cyborg had a long grueling match against an already tired Dean at ADCC in which he only passed at the very end to win by points. On the other hand, Barnett just ran through Dean in a manner that was a bit frightening. He took a few minutes to pass the guard in the way I sometimes take a few minutes to open a jar of pickles; it might annoy me for a bit, but it ain't stopping me.
The only increased threat that Cyborg offers is a more dynamic open guard. That makes the match interesting, perhaps, but Barnett excels at smashing and passing guard.