^ I don't see what the impetus is behind messing with what I think many would consider to be a 'cult classic', though.
The only way I think you could justify doing a new Rockeeter movie and avoid people questioning the impetus behind the project would be to make the new cinematic Rocketeer character part of the MCU, but I don't know how much leeway Disney has in terms of adapting the characters and concepts from the Rocketeer comics.