I would love to see someone do something with 8-ball and I think you're right about the back stories or storylines being important.
It needs to be 8-Ball. The game is more popular and relatable among the general public than all other games combined, x100.
It needs good commentating, and good editing. Not broadcast live.
Each episode should have a segment that features the player's backgrounds. It only needs to be a few minutes. The NFL wasn't built in a day. Every Sunday it's players, traditions, and history are built upon and
told sold.
Borrow formulas that work from other shows. I mentioned The Mask. As the show/ players gain popularity, allow fans to attend in person. Again, don't air live, just a live audience. Maybe throw in a championship 'season finale' that's broadcast live.
Create "teams", or alliances, like WWF professional wrestling. People like affiliation and feeling like a part of something. Probably better than the lone ranger stigma, as well. We like choosing our favorites, and antagonists, and become invested when the player's plights are relatable. The real pool competition in the show is a bonus.
People gravitate to game shows because of the prize money. Pool has this covered, too.
Production cost would be peanuts, relatively speaking.
Want real money in pool? Get a real TV network to re-sign for a 2nd season, or 5.