There are lots of Star Trek TNG style shows on the air right now. Just, they're all about detectives or doctors none of them are set in space. People love procedurals with political messages.
Star Trek: ID is nearing $400M worldwide. They'll make sequels.
I would personally enjoy a show set at the academy but I can't imagine anybody who is not actively obsessed with the show tuning into see it. If another Star Trek series is ever going to be a ratings hit, it will need to revive the premise of the original.