"Spider-Man 4" seems to be in a tangled web of uncertainty.  

Sony Pictures and director Sam Raimi are at odds about the direction to go with the villains for the fourth installment in the "Spider-Man" franchise.

The delay in the scheduled spring production start raises concerns about the film making its May 2011 release date.  

The criminal Vulture is Raimi's pick for the primary antagonist in the film, however, the studio disagrees.  

Sony Pictures would like a different villain and a romantic sub-plot with the Black Cat.  

The delay in script approval and production will most likely leave a highly valuable opening date in the first weekend of the Summer.  "Thor" could move it's release date up two weeks to fill the spot.