Watched the Mystery Science Theater 3000 episode "Mighty Jack". Was amazed at the potential for an AWESOME campaign premise:
Danger Squad!
Danger Squad! is a top secret organization that everybody knows about and which has its own logo and designer uniforms. Dedicated to preserving peace and fighting evil, they have operatives all over the globe, but mostly just in Japan with Japanese agents. Unlike most secret spy groups, Danger Squad! doesn't just have amazing gadgets - it has full access to massive supersonic toy-like vehicles that can shoot lasers, fire missiles, submerge under the ocean, and serve as launching platforms for other, smaller toy-like vehicles that also can blow things up. Danger Squad! is opposed in their quest for truth and justice by the nefarious organization known only as "Z". Also global in scope but mostly composed of weird-faced European guys and half-Japanese creeps, Z is led by a mysterious white guy with a pet cat named Flopsy.
Danger Squad! would combine '60s spy hijinks with scenes of tokusatsu mass destruction featuring the aforementioned toy-like vehicles, giant robots, kaiju, and probably some of these guys:
I could see myself running it with Feng Shui, Mutants and Masterminds, HERO, or even SpyCraft, but I'm weird like that. It'd also probably only be good for a one or two shot, as the sheer goofiness of it could collapse on itself.