I'd be methodical and strategic about it. I wouldn't rush right over to CBS, bang on their door and demand they sell me the rights to make a
Star Trek TV series forthwith! That might give a bad first impression and I don't want them to call the cops.
First, I'd revive the credibility of space opera on TV by making a non-
Star Trek branded series, focusing relentlessly on making it a stunning ratings success above all other considerations.
There are many possible ways to achieve this, such as a small band of colonists fighting terrifying alien critters (
The Walking Dead in space) or a complex, sexy, violent saga of interstellar politics (
Game of Thrones in space). The "space prison" idea being bounced around in another thread also has possibilities.
Those ideas would work someplace like HBO, Showtime, AMC or FX. Or, I might also go more family-friendly on TNT or even the dreaded SyFy with an old-fashioned TOS-like story of a Starfleet-like organization patrolling the frontier of a future spacefaring civilization.
I'd look at a large range of ideas and whatever seems the most likely to take off as the Next Big Thing would get the greenlight. Once that's established credibility for a couple of successful years,
then I make my case to CBS that they are sitting on a pile of money and doing nothing with it.
This way, not only would Star Trek be revived, but I would end up with a business that fills a niche that is not being served right now - not just the niche of space opera, but the niche of being willing to produce TV that is more than just me-too bandwagon jumping. Nobody else has a private fortune that they are willing to risk blowing on some crazy scheme, which is why nobody (except George Lucas) could do what I can.
Yeah, I would have liked to have seen the birth of the Federation done properly. However, I'd probably want to start from scratch and forget that Ent ever existed.