Thanks for posting these. In those pre-internet days, I had never heard of this part of the set.
As for the Superhero Squad game, sadly it was closed some years back....maybe 4 years ago? It was something about the platform they had used to build the game becoming obsolete and that it would require a total redesign/rebuild. The Gazillion company didn't want to invest in that and went on to the other game they developed..... maybe Contest of Champions? I'm not sure.