No it's mostly that you're a moron. Read for yourself:
From Reelz.com:
When host Simona Ventura asked Malkovich about his role of Vulture in the movie, he not only didn't deny his involvement, but confirmed that he's waiting for the final script to be sent to him, and that the movie has been delayed. He also hopes that shooting will begin as soon as possible.
A second article after Spidey 4 was shelved:
For a few months, news that John Malkovich would play the Vulture in Sam Raimi's Spider-Man 4 filled the Internet, until Sony pulled the plug on the sequel and decided to reboot the franchise instead. Malkovich told Collider that he was "disappointed" with the decision.
Yes [I was disappointed], but because I like Sam and I like Tobey [Maguire] and all that stuff, and the producers, two of whom I'd met before because I'd been offered the first [film] ... I came to like them, so sure why not? But it didn't play out.
Malkovich had been offered the Green Goblin role, which eventually went to Willem Dafoe, who eventually appeared in all three Spider-Man movies. While Malkovich was clearly happy to play the Vulture, he thinks it may have been the role, itself that of an aging villain who can fly with the aid of prefabricated wings that was the movie's undoing.
Well, I think a lot of the people who sort of follow that genre.... I'm not sure, I never really spoke with Sam about this, but I'm not sure they maybe the kind of fanbase, the fanboys either didn't approve of that character as an adversary for him to some extent ... or maybe the studio. Or maybe that was totally unrelated to why it fell apart.
Now, even you can discern from the above that-
1. Malkovich confirms his involvement.
2. He makes no mention of what role Hathaway would've played or even that she was cast in the film.