Star Trek has four movies in various stages of development at the moment. We know about the Paramount+ exclusive film Section 31, featuring the return of Michelle Yeoh to the franchise. Patrick Stewart has alluded to a Picard film that may turn into something. Then of course you have the two theatrical films, the untitled Star Trek 4 film and the untitled Star Trek Kelvin universe prequel.
And when the news of the four films broke, we were all excited about the possibilities that came with them. Boy, that was a fun time two weeks ago, but it sadly is time to burst some bubbles; it's unlikely all of those films get made. The best shot for completion is Section 31. It should begin filming any week now, barring unforeseen circumstances, and no matter what happens with the potential sale of the company, it's likely it'll be finished and pushed out the door for fans to enjoy.
Outside of that; everything is in a hazy state of uncertainty.
The Picard film is the least likely to ever see the light of day. Not only due to Patrick Stewart's age, but the idea behind the film is that it'd be a Paramount+ exclusive, and Paramount+'s actual existence is very much up in the air. It may not be around in a year.
If it's not around in a year, that film certainly won't be made.
As for the two Kelvin films, there's no certainty either gets made, especially with the pending sale potentially causing plans to change due to budgetary reasons. Star Trek 4 has been idling for close to eight years, and this new prequel film idea is just an idea for right now.
Keep in mind we're in an era of Hollywood where completed films get shelved forever and never released. So even if the film gets cast, a script is written, and the film gets shot and edited; there's still a chance that it never gets to see the light of day.
Be grateful for every new piece of Trek media we get, because we're heading into some new and interesting times as a franchise.