One of the smartest things Marvel did when faced with Edgar Wright's departure from "Ant-Man" was enlist Paul Rudd to not only remain attached to star as Scott Lang in the film, but also to take a crack at the screenplay. When I was on the set of the film, it was apparent that Rudd and Adam McKay and Peyton Reed had a tight working relationship that allowed them to very quickly rebuild things a different way. By having Rudd become that involved with the script, there's a pretty good chance he's going to want to stay attached to star, and if anything, he'll become even more passionate than he was when his good friend Edgar was still attached.
Now Paramount's using that same (very smart) playbook, it looks like, with word breaking that Simon Pegg is going to co-write the screenplay for "Star Trek 3." No word in Deadline's piece about who Pegg might be co-writing with. I know that Edgar Wright recently wrote "Baby Driver" by himself, and as a result, it doesn't read like any of the Cornetto films. Not exactly. You can still hear Edgar's voice, but it's not tempered by anyone else's sensibilities.