Look, first and foremost, let me just say that I used to religiously shell out the ten bucks a week to watch the weekly ppv programs, as I was assured of seeing some kick ass angles and matches, especially the X-Cup. It was a non-stop blur of spots that saw moves you could never see in WWE, such as the Shooting Star Leg Drop. But, other than many of the international X guys that came in, just about every guy looked the same. They all pretty much employed the same style, except for a few signature moves. And that is where the problem lied. There was no way to distinguish the guys in the ring that you would see in TNA from any guy that WWE could bring in at any given moment. And TNA was tops for a moment, until WWE started bringing in well known, established names, and took some of that attention away. That's when TNA realized that they didn't need wrestlers, they needed characters. And that is what every mainstream wrestling fans recognizes and relates to, characters.
Now while I will give you the fact that Triple X put on a match of the century back when TNA was wrestlings best kept secret, the mainstream, ratings generating crowd showed that they could care less about The Fallen Angel. They showed little reaction when he brought back Triple X. They showed even less reaction when Curry Man went away and he returned. Even when he, Samoa Joe, and AJ Styles attempted to recreate their classic triple threat match, the crowd was more into the characters of Joe and AJ than they were into Daniels. And the main reason being was that Aj, Joe, and even Curry Man were relatable characters. The Fallen Angel simply was not.
And that is mainly why you see a trend in the tough ground known as ROH where they spend alot of time focusing on developing individual characters and storylines. You see it all over. The X-Division can never go back to what it was. TNA tried to revolve the X-Cup and nobody cared. They tried bringing back some of those pure wrestlers TNA had, and nobody cared. But bring back Sharkboy? I guarantee you that people will care. Why? Because he's a familiar wrestler that people can relate to.