The late 90s Iron Man and FF toons were syndicated, airing as the ''Marvel Action Hour'' or some such title, and didn't air on Fox Kids.
Well, that might explain it. Anyway, unlike Spider-Man and X-Men, it wasn't as obviously accessible due to the syndication.
The IM and FF cartoons also weren't all that good. Well, I'm splitting the difference: the first seasons of both shows were mind-bogglingly awful, while the second seasons -- completely revamped with new creative teams -- were decent, but still mediocre in comparison to the Fox Kids Marvel shows.
There was actually a pseudo-crossover, in that when Iron Man and War Machine appeared on
Spider-Man, they were played by the actors who played them on the syndicated show, Robert Hays and James Avery (although Avery had previously been replaced by Dorian Harewood on the IM show itself). However, when the Fantastic Four later appeared on
Spider-Man, only Johnny Storm was played an actor from the syndicated show.
There's also a weird relationship between the
Marvel Action Hour shows and the subsequent UPN
Hulk series from the same producers. FF and IM were in continuity with each other, and they both had Hulk guest episodes as backdoor pilots for the Hulk series (albeit with Ron Perlman playing Banner and the Hulk, roles played by Neal McDonough and Lou Ferrigno in the series). But while the Hulk series that followed was in continuity with the FF Hulk episode (and a loose sequel to it), it completely contradicted the IM Hulk episode.
There was also a Silver Surfer cartoon on Fox (?) from the producers of X-Men, but it only ran for one season.
Yeah, I liked that show. I believe it was Fox as well. That was pretty much when I was aging out of cartoons, so it fit my age demographic. Unfortunately, I had other things going on, so I don't think I caught every episode. And, obviously, it got canceled before it really got going (ending on a cliffhanger).
The cliffhanger on the
Silver Surfer series involved Thanos activating a weapon that was in the process of destroying the universe when the episode ended. So I just assume he succeeded.
