I'm really surprised with the amount of support this Joker Sting is receiving. Somebody mentioned that it's good to see TNA change up an iconic character like Sting and I would agree with that... A big complaint that I have about TNA is that they don't differentiate themselves from WWE nearly enough, and a big part of that is importing the gimmicks of the WWE stars when they show up in TNA. And before anyone mentions it, I'll admit that I didn't have a problem with Sting's Crow gimmick being a ripoff.
I don't think the Joker gimmick has been executed well at all though. I don't watch a great deal of TNA, but I don't recall any real descent into madness by the character... his makeup just sort of changed one day. The Crow worked for me because the story leading up to the evolution of the character worked. The Sting character felt abandoned by the company and disappeared; the nWo, lead by Hogan, subsequently started to gain power over WCW, which had no real figurehead at the time. Crow Sting acted as a great foil for a rogue group running roughshod over a noble group in disarray. Dark, unpredictable and able to instill uneasiness in the entire rogue group. It was well executed.
This just comes off as the bullet points of the Crow presentation, like seemingly all of TNA's stolen gimmicks (i.e. Crimson's Goldberg, Anderson's Stone Cold); Sting = interesting cult movie character = Crow = Joker, Crimson = big new non-descript quiet intense guy = winning streak = Goldberg, Anderson = swearing redneck = Stone Cold. I don't have any problem with parody done well, or 'stolen gimmicks.' But the lack of effectiveness really speaks to creative's limitations. I don't think very many people are tuning in to see what crazy Joker Sting will do next week, partly because only a fraction of those who tuned into WCW back in the late 90s care to see a feud between Sting and Hogan in 2011. Saving that, the conditions don't exist to have Sting act in such a way.
From personal taste, I don't think the Joker Sting is well portrayed either. Heath Ledger did a fantastic job of transforming that character from the Cesar Romero/Jack Nicholson cartoon into a dark, deranged, somewhat human antihero that people were emotionally invested in. THAT is something from which TNA and Sting could have benefitted: character development. This seems like another band-aid type quick fix to a problem (character staleness). This character is not believable and not interesting. I am not emotionally involved and I will not tune in to see what he does next. I feel bad for Sting, because it's more creative's issue than anything. Then again, he's continually cited wanting to feud with Hogan and Flair before he retires, so I guess he gets what he deserves in a way.