Yeah it's a little disappointing that the chances of Wolf (or Broken Tusk, or Ahab) are slim due to that, but with Illfonic showing that they're willing to add Predators from the EU there's still a ton of cool choices available, not to mention obvious ones like City Hunter and Mr Black etc.
Though I liked Celtic's bio mask taking inspiration from the original Stan Winston version I wasn't too hot on the AVP1 Preds overall, so the potential lack of their inclusion isn't a big deal to me.
EDIT: Actually I wonder if they might be able to sneak Ahab in due to the loophole of him first appearing in the Predator-only Fire and Stone series, rather than AVP? I wonder what license all of that stuff falls under.