The Six American Warriors Include: Destroyer (Keene Marlow), The Black Marvel (Omar Mosley), Miss America (Madeline Joyce), The Whizzer (Bob Frank), The Thunderer (Jerry Carstairs) and their leader Captain America (Steve Rogers). All of these heroes are from the Golden Age of comics and were featured in comics from the 1940's published by Timely Comics (before they became Marvel Comics and only Captain America appears in Marvel Comics).
The Rhino only speaks once, but his voice is not done by voice actor Don Stark this time. Richard Moll provides the voice for Rhino's lone line of dialog.
Destroyer/Keene Marlow finds out The Black Marvel was actually Omar Mosley all along instead of Dan Lyons. Originally Dan Lyons volunteered to become one of the Six American Warriors, but his millionaire father, an influential senator with a bunch of security clearance, found out about it and forbade it. To him it was a dangerous risk unfit for his offspring. However, Omar Mosley, volunteered to replace him. They let everyone in the secret service think Dan was the Black Marvel and Omar was his African-American chauffeur, times were different back then. In the comics, Dan Lyons was actually the Black Marvel.