All these are legitimate superhero movies that may have actually been made, if not for other issues that got in the way. Their legitimacy is courtesy of Wikipedia (yes, Burton and Bay were actually considered to work on a SUPERMAN film). They all sound interesting and great, even Burton’s Superman (it was probably the prototype of SUPERMAN RETURNS, but even in that sense it would have been interesting). But I think Bryan Singer’s X3 gets the top spot. That was the greatest missed opportunity EVER.