Yeah. Black Panther and Monster Hunter Girl show up for a major plot point and then quickly go their separate ways. They're introduced, sidelined as soon as possible, and then forgotten after this part of the story is done. You don't get to play as them, there's not even any cool cutscenes with them. In fact, there's cutscene with a giant sand dragon, Ryu and Hulk take it out while you get to see nothing from MH Girl and Blank Panther.
Wow, just wow. So they have pre-announced dlc characters showing up in story before they're even available for play? LOL CAPCOM