IATSE. SAG. MPAA. WGA. DGC. They’d all take issue, if you take a TV episode and then released it as a movie. For different reasons. For CW superhero shows, it’s this
one.
For Star Trek and it’s supervising guilds and unions, I’d say unless CBS is prepared to go back and give everyone a pay rise up to movie rates for whatever episodes they convert into films, you won’t get TV episodes getting a theatrical release beyond special events. Crew rates for movies made in Ontario are significantly more than TV rates, which is why Hollywood movies don’t really get made there.
(I saw Sherlock and Game of Thrones finales in cinema, but they were just TV episodes shown in cinema as one-offs. Not movie edits.)