While I can see why some dislike the alternate ending for the current Predators, the "switch" in the original 1994 script made some sort of sense. In it, he teamed up with the Classic or Crucified Predator because he needed a way off the planet; once they made it, they headed a course for Earth. They were both outcasts, Classic humiliated and strung up by the higher-up Predators, Dutch hunted like a dog. That's a scenario I'd like to see -- Garber's task force hunting Dutch across the globe, catching him just as a crack team of soldiers/cops/cowboys comprised of stars Samuel L. Jackson, Michelle Rodriguez, Bruce Willis, Chuck Norris, and David Caruso stumbles into the Predators' path. With nowhere to go, Dutch could reluctantly ally with the Predators, at least for a brief time; presumably, after having eluded the government for so long, he could have earned more respect from the Predators, enough so that they treat him as a wild game animal that needs to be conserved.
Either way, this announcement makes me happy, not only because of the promise of finding out what happened to Dutch, but also because it shows that the franchise definitely has a future! I mean, think about it, there's a *script* already out there!?