[Mesnick]

Here's an idea I had. If Jetman had aired 10+ years later, Birdman Dan from Back Dimension Dimensian Soldiers would have likely survived and remained as the show's Sixth Senshi.
It would also be interesting to see how this would affect the show as a whole. From what little was shown of him, this is essentially Gai in miniature, both in plot and character. So it would at least be interesting to see how Gai would react to his less mature, but therefore also more amenable to change version. And how this would affect the fate of the Black Condor himself.
True, there is another detail that the reality where Jetman emerged in the early 2000s most likely remained without any of the iconic Kamen Rider shows.