The episode is amazing on how it took a space story like this and turn it into a film noir, "Logan's Run" story. The best part was all of the obscure characters in the episode. This is my favorite of the episodes so far. It is reminiscent of the DC version of What If, called Else Worlds. The story has a decent pace and the best part is that you won't need to see the Marvel films to keep track of what is going on. The episode is a complete with a familiar theme to the story.
It's always astounded me that they can get so many of the Marvel voices cast for these episodes.
Might we have seen here the "G" shield that was used in another reality from Exiles vol1, issue 23? It was given by Galactus to Reed Richards in that world.