Villeneuve for Alien
Let Predator just settle for a while IMO, although Peele wouldn't be awful, since he's been mentioned.
AvP - Jordan Vogt-Roberts, with the caveat of having a genuinely competent script. Possibly a left field choice but he can do an entertaining monster mash and imo could do great work with AvP, again with the right writer.
AvP is also the only one olm8 Blommy should be allowed near.