Screwed by the Network: When Season 2 started on Cartoon Network. It only aired on Saturday mornings. At 6:30 AM.
What Could Have Been: Spider-Man was supposed to be in the show, possibly in Falcon's spot, but then rights-holder Sony refused. The closest we got was in the Ultimate Spider-Man episode "Flight of the Iron Spider", which shows a SHS-Spidey in one of Spidey's own Imagine Spots as Tony Stark is talking about an invention that can send people into different dimensions which also serves as a Chekhov's Gun as that's how he gets rid of the Living Laser - sending him exactly into SHSS to be beaten up by Thor.