I’m talking about John Kreese (Martin Kove), who we finally see fighting Daniel in the trailer for Cobra Kai Season 6: Part 2 that just arrived. Watch it above. The battle tease is brief, but I managed to capture a shot of it. We can only hope it's a long sequence, because these two have serious beef:

Netflix teases brutal karate action at the Sekai Taikai tournament in Barcelona as internal rivalries and doubts stand in the way of the students becoming world champions.