The Nexus storyline from two years ago is close, but it has to be the Invasion angle.
That angle had dollar signs written all over it and the WWE screwed it up from the get-go by making WCW and ECW so inferior to the WWE.
The only two WCW and ECW stars to come out of it looking good were Booker T and Rob Van Dam, and they still lost.
The WWE was still a very hot commodity in 2001 and Vince should have paid whatever it took to get at least four out of the following; Hulk Hogan, Kevin Nash, Scott Hall, Ric Flair, Scott Steiner, Jeff Jarrett, Goldberg, Rey Mysterio, Lex Luger, Sting, Eric Bischoff and Randy Savage.
I think most, if not all, of them were still under a very profitable AOL contract until at least early 2002, but they could have definitely got Mysterio, Flair, Bischoff and Steiner. Hogan, Jarrett and Savage weren't even under an AOL contract.
Bottom line, it would have helped to have some of WCW's stars from the Monday Night Wars.
To make things worse, Vince McMahon's children, Shane and Stephanie, were placed as the authority figures for WCW and ECW, respectively. Stone Cold Steve Austin and Kurt Angle become members of the Alliance.
Epic fail written all over it.