I'd take over The Simpsons and then cancel it.
I want to smack you so hard. The last few seasons have been really good.
WWE would not count as that is a company, it would be like picking the NFL or UFC. WWE currently has 4 shows (well, technically 5, but that 5th one is a 1-hour condensed version of their main show and airs at 2AM on Sunday). I don't know how familiar you are with the reason they changed names, but they didn't do it by choice. After they were sued by the World Wildlife Fund (known as the Worldwide Fund for Nature in most countries now), they were legally not allowed to use the "WWF" initials anymore. WWE actually doesn't have a steroid problem anymore, although indy feds are a different story.
TNA is just a mess, they seem to make it up as they go along and never explain anything. Sting turned heel 8 MONTHS ago and they still have not clearly explained why. You have Samoa Joe be kidnapped on national television and no one saying anything when he showed back up 3 weeks later (or the previous year when he was trying to kill people with a machete).
There are a lot of shows, but I guess I would go with
Star Trek: Enterprise. One reason is I want the primary timeline back (not the alternate timeline created in the 11th movie). The show really kicked into gear in the 3rd and 4th seasons. Manny Coto (who became showrunner in season 4) revealed several ideas and stories they planned to do if they had been given a 5th season, including:
*Having a 3 or 4 episode arc in the Mirror Univers (similar to the two-part episode "In a Mirror, Darkly" from season 4) which would have followed up on Mirror Hoshi's attempt to become Empress of the Terran Empire
*Showing us Phlox's homeworld of Denobula
*Having Alice Krige guest star as a engineer that gets assimilated by the Borg and becomes he Borg Queen episode
*Have hints at the formation of the Federation and inch closer to the oft-mentioned but never seen Earth-Romulan War that took place from 2156-2160 (season 4 took place in 2155)
*Revealing that T'Pol's father was Romulan, thus making her half-Romulan/half-Vulcan.
*Having the fan-favorite Shran join Enterprise, possibly as an advisor.
*Follow season 4's trend of linking it to previous Trek series by finally making the Kzinti canon (they have only appeared on
Star Trek: The Animated Series, which is officially not canon) and visiting the cloud city of Stratos from the
Star Trek: The Original Series episode "The Cloud"
They also would be able to keep Trip on the show as he wouldn't "die" until about 5 years in the future as it was established that he died in 2161.