Within the GBA version of this game are placeholder texts for a title screen and a test boss. Both hold the name Martin Schioeler in them.
Contributed by psyducklover13
There was a cutscene with Spider-Man planned for the game, placed sometime before the Magneto boss fight. Rino Romano (reprising his role from Spider-Man Unlimited) had recorded his lines before being cut. The removed scene can be unlocked by collecting all the dog tags in the game.
Contributed by gamemaster1991