First off, forget about WWE buying TNA. It would make zero sense. They can't air programming on Viacom, so they wouldn't be able to keep the TV deal. And they wouldn't be eliminating competition because Spike would eventually fill the void. People don't realize that Spike has had wrestling on the network since 1999. They dumped ECW for WWE and then when WWE left they immediately signed TNA up. If WWE were to acquire TNA it would be another fake invasion angle and another rise and fall DVD while some other wrestling promotion will pop up on Spike.
As far as a new owner from TNA. The names going around would be a step down, as they apparently don't have the cash at least in terms of running TNA and aren't much of a big deal otherwise. New ownership would only be a positive if it's Viacom or some Billionaire that wants to get into wrestling because they've got nothing better to do.
Can we please move on from the thought that TNA needs a cash cow and a "big deal"? Sure, whoever it is needs some financial backing, but more importantly they need a vision and the will to execute it properly. A "big deal" would only get them attention for a week. A passionate, creative thinker will sustain them for much longer. Is he going to have money? He has to, at least temporarily. Still ...
We already saw what would happen if TNA was backed by someone with lots of money. They'd spend it. Meanwhile, the people on top had no particular vision. They had many visions due to their president being fed different versions of TNA by a billion people, turning it into a strange mix of many things. Sometimes it worked, most times it didn't.
Personally, I think TNA need a creative mind. Someone who can make good Television and not get too caught up with other ventures. Not until the show itself is as good as it can be.
Dixie, as great as she's been to TNA (the bitch ran it for 10+ years, give her some credit), never really had a "wrestling" vision, I believe. She was never a wrestling fan, I doubt she learned to love it as much as wrestling fans did either. I think she loves TNA and everyone involved, but the wrestling genre? Doubtful. Her biggest problem in my view was that she listened too damn much. She listens to her employees, she listens to her writers, she listens to guys like Hogan and Bischoff, she listens to the damn fans (smart move), she listens to SpikeTV. And on top of all, she tries to mix all of that and please everyone and by doing so she ends up pleasing no one.
McMahon is a big asshole most of the time, but he doesn't listen to anyone but himself and his own gut. He couldn't care less if we hated or loved something. He couldn't care less if most of his roster hated his guts. He has his own little vision, he believes it works and he executes it. Does it work? Not right now, but this confidence in his vision has saved his ass many times before. It's why he has all these money in 2013, allowing him to make mistake after mistake with not a lot of backlash. He earned it by executing his vision ten years ago.
Heyman, who's an overhyped "genius" for me, still had a vision for ECW and saw some success. He ain't no Einstein but he had a clear vision of what he wanted and lots of passion to go. ECW was smaller than TNA is right now, didn't last as long and is still more memorable for fans. Guess why.
So, TNA needs a passionate fan behind them, with the means to execute a vision that is similar to what the rest of the fans want. Unless Dixie spends a lot of money on research, I don't see how she can get a sense of what the majority wants. A wrestling fan would be much closer to that than Dixie. Billy Corgan or whoever it is.
In my opinion, money + vision + passion + knowledge = a shot at surviving a few more years and maybe even reaching higher grounds. Up until now TNA had only the money, and not in bulk. No vision, some passion, zero knowledge. Ya need all the gears for this clock to run.