The famous character Iron Man could have a crossover with Sam Raimi’s Spider-Man 2 Dr Octopus, but it was not possible back then.
The MCU or the Marvel Cinematic Universe as the world now knows it began in 2008 with Jon Favreau’s Iron Man, which also made the way for many of the other characters from the Marvel Comics to jump to the big screen.
But, now before Iron Man made the whole MCU possible, other of the superheroes have already had their own movies, most notably Spider-Man.
Iron Man to Crossover with Spider-Man 2
The Spider-Man trilogy was then released between 2002 and 2007, and then while Spider-Man was not that best, the trilogy is also credited to redefining the modern superhero genre as well as the summer blockbuster.
Because now Sony owns the rights to the Spider-Man, Peter Parker did not appear in the MCU until the year 2016 in the Captain America: Civil War and then got his solo film the following year with Spider-Man: Homecoming.
The Raimi’s Spier-Man films are their very own universe, separate from that of the MCU, but they even could have been linked years ago, as the main initial plan for Iron Man included a crossover with the Spider-Man 2 through a bad villain.
At that time Iron Man was a big risk for the Marvel Studios, as it was its very first self financed film, it also spent years in the development, and the superhero genre had already some not-so-good films.
Everything then turned out for the very best, and thus the MCU was born, but the very first ideas the studio had for the Iron Man were then completely different from the final product.
A very early draft of the script had a reveal linked to the Sam Raimi’s Spider-Man 2: Tony Stark was the creator of Dr Otto Octavius’ tentacles, and thus he would have played a very important part in the Spider-Man 2.