I’ve never played Marvel, which people talk volumes on both plus and minus. With Great Power was too fussy for me in play. Have sorta heard good and bad things on Capes. So, taking a step back from the systems: what is it that a comic story delivers and what do you want to do when you sit down to a Golden-Age supers game, movie, comic book?
There are plenty of games that encroach on modern, alternative comic formats. But it doesn’t seem like there’s a lot of successful ones that address “whammo”. My interest is in specifically one-shot games (option for multi-game but not to support campaign style) in a non-traditional rpg style.