[En Sabah Nerd]

I don't know any concrete details about Predator 4 besides the fact that when Fox first announced it they forgot to say it was a sequel. For about one whole day people were all "WTF! How dare they remake Predator!" and I was in agreement, and then director Shane Black was all "No, it's a sequel" so I was able to breathe easy again. I like all 3 films, here's hoping I'll be able to like the fourth.
Regarding Renegade's gun, it could technically be any number of things all rolled into one. It could have automatic fire, semi-automatic with more powerful shots, cannon-like explosive effects, it could even have a flamethrower. There isn't much sense to guessing what it does, as long as it looks good with the toy.