Coby is an advanced observation user, has medals under his belt, known as the hero of rocky port incident Law was known as the mastermind of, already a rear admiral and keep improving.
He is probably even stronger than his rank suggest. Can't wait to see him go all out
On the other hand, I don't see Hancock defeated either. Likely that it'd turn into something Luffy related since they both know him personally
Blackbeard wanting to get "that" before the marines is another interesting bit Oda left this chapter, but the bad thing is Oda always off-panels the interesting bits