This is how I would do predator
He starts out in hunter mode where he has the ability to stalk survivors, in this mode he earns tokens for m1 hits that unlocks the ability to use his shoulder cannon attack or perhaps a laser, this attack has a small hit box but is very fast making it both hard to dodge but hard to hit as well. When fully stalked he can than unlock camouflage mode, this gives him invisibility and the ability to see survivor aura for up to 30 or 60 seconds.
Since he can m1 while in camoflauge mode if he gets stunned while invisible it will take him out of camouflage mode and the time remaining in this mode is converted to amount of stalk needed to reactivate it.
Survivors on the other hand can interact with mud piles on the ground to cover themselves in mud which will block his heat vision for up to 60 seconds and if they take damage they lose that effect.