They're making a new Predator movie?
*one wiki search later*
So, the movie is supposed to be a sequel to the original Predator movie, but set on the Predator home planet, and Robert Rodriguez is producing. Also, the name of the movie is Predators.
The concept in itself presents a couple of problems, such as, why does Robert Rodriguez thinks he's James Cameron how will they explain the human presence on the Predator home planet without turning this into AVP?
As for Topher Grace being in it, I wouldn't worry too much about it.