Anyways, DD feats back up the idea that he takes a majority over Nightwing :D
Well that's true. But considering that you conceded that Cassandra Cain can get the majority win over DD, I don't see DD stalemating Bruce.
Hey, it's not like Cassandra wouldn't get the majority over Bruce either, it's debatable, but I think she would. And I think DD stalemating/beating Marvel's best fighters like Iron Fist, Black Panther, Captain America, Wolverine, Taskmaster (All superhumans with physical advantages over Matt) is proof enough that he could stalemate Bruce H2H. With gadgets, Bruce takes a majority over Matt though.