Agents of Justice was an attempt to use the XCOM concept in a new setting, but it got bogged down in the move to a new graphics engine (which was never Simtex's strong point). What they showed each year at E3 was great, but they did that 3 years running. Freedom Force doesn't have the same scope as the original, but it's a reasonably good if limited RPG/strategy hybrid.
When you said Superheroes, at first I thought you meant Superheroes of Hoboken: an extremely funny RPG/adventure hybrid.
