I thought Rodriguez was already talking about making a sequel called PREDATORS 2. But perhaps I'm confusing talk from before the release of PREDATORS with post-release sequel chatter.
I could go either way on a sequel, honestly. PREDATORS was good a 'meat and potatoes' action SF movie, but it was hardly outstanding. Unless a unique environment or some other twist can be applied to the franchise (and, as fun as Aliens and Predators in the same movie should have been, two tries has shown that idea to be more than played out) why bother?