@BANEkilla98
I'm not sure I agree with your points.
Has Batman ever officially been called the greatest martial artist? I would have thought that title would go to someone like Cassandra Cain or Lady Shiva.
I don't think its fair to say Superman and Martian Manhunter "just go in with super strength." Maybe when they were rookies, but I'm with their experience they've taken some advanced fighting lessons. MM probably took some in basic Manhunter training. Superman learned boxing in Superman vs. Muhammad Ali, for example.
Saying Wonder Woman doesn't have any martial art skills is quite incorrect. She was trained in hand to hand combat by the Amazons, some of the greatest warriors in the DCU. Even without super-strength, I think she'd beat Batman if it came to hand to hand. (And I think she did when they were sparring in Joe Kelly's JLA run.)
Batman might be a bit more skilled in PE, though I'd want to see a confirmation from an official source before I called him the "greatest martial artist."
Just my thoughts.
EDIT: I see you said he was "one of DC's greatest fighters" not "THE greatest fighter." I'm still curious if that's been officially concerned.