I don’t think they’re doing so much of a TOS reboot as a TOS continuation with some retconning and reusing some SNW sets and cast.

I’ve heard it floated around that it would depict the start of Kirk’s mission, which TOS didn’t depict, showing the crew already relatively comfortable with the ship. Personally, I’d like them to something of a year 4/5 that takes place either during or after TAS. As I mention elsewhere in this thread, I think “Yesteryear” would be an awesome remake; it could be pulled off in one 50 minute episode (already double TAS length), but I think it would be awesome to extend it to a two parter.