No, there are rumors. I'd rather have Prince Nazeem than Khan, but more current fighters are needed.
Abraham, IMO, isn't worth DLC. Just create a bald CAB who fights dirty, has a peekaboo stance and follows you around throwing five or six power modified straights or hooks a round. Give him about 15 to 18 on hooks and straights, 18 on chin and 20 on heart with 0 for head movement and 75 for speed. Add 80-85 for cuts/swelling and you are done.
Give me Bute, Ward, Dirrell, Kessler and, I hate to say it, Froch. Or at least Froch's wife as a ring girl. That would make EA more money on DLC than all the XP packs bought combined! Lol.