I would explain my petitions like this:
- Make the Predator more badass. It's common for monsters to become less powerful as the movie series advances, they should respect the Yautja and keep him as a complete badass.
- Predator fighting unarmed. So far the Predator has won with aids, he uses his superior technology to kill his prey. Have him fighting unarmed next time, and show he's very powerful even without his equipment.
- No more than 2 Predators. As more Predators there are, they become weaker, and usually easier to kill. If we make it like Cameron's Aliens or AvP, for sure many Predators would be killed. For the xenos that was not that bad because they're more like animals, but Predators are supposed to be intelligent and have a personality. Use 2 Predators max for the movie.
- Show us a different chaste of Predators and create a different scenario. So far we have only seen the Hunter Predators, and that can be boring and repetitive. I'm sure there would be other chastes of Predators, like ruler predators, law enforcer Predators, perhaps even scientist Predators. It would be fine to see a twist on the Yautja -while not desattending the classic hunter Predators- and see how Yautjas from other jobs look like. Also, change the scenario; so far there have always been Hunter Predators hunting humans. A twist on the idea is necessary to make the series to advance and stay young.
- Don't make the Predator the Hero. Again, in horror movies there's a tendence on turning the monster into the hero, either a tragic hero or an antihero. Don't do it with the Predator, that would be very cheap.