And let's not forget -- The Rocketeer
is itself a near-remake, or rather a pastiche, of the "Rocketman" character who appeared under different names (the most famous being Commando Cody) in four Republic serials:
And the Rocketman suit in the Republic serials was inspired in turn by the Buck Rogers comic strip!
Not to mention that the Rocketeer's girlfriend is a pastiche of a famous pinup model, his rocket pack was implicitly built by Doc Savage -- the whole thing is highly derivative to begin with! Not that that's a bad thing; lots of creativity is about taking pre-existing elements and paying tribute to them in a fresh way. But it goes to show how completely nonsensical it is to complain about reusing old ideas when talking about The Rocketeer
. It wouldn't even exist
if not for the reuse of old ideas!