Considering its been identified as the Ilfonic Predator I suspect we will get skins and it wont be full customization. If we ever got an RPG that would be a thing but for 10 or 15 minute matches I don't think its absolutely necessary to do this. We're not particularly short on Predators, you could make a full roster on the first two films alone.
Jungle Hunter and Fugitive likely made the cut with JH aesthetically seemingly being the inspiration for Ilfonic's Predator and the game based on his film, and Stargazer was name dropped with The Predator being the most recent film. SO I'm more than expecting Jungle Hunter and Fugitive to appear. Ilfonic's design is probably the default.