To me, Mego-style figures just don’t work at the 14-inch scale.
The Spider-Man Mego figure on the Wayne Foundation playset is a nice touch from this 1979 Mego catalog.
Figures Toy Co. is producing retro-style Batmobile and Batcyle vehicles (and in multiple colors). These are reproductions of the versions Mego produced in the 1970s.
Here’s a 30 second commercial that Mego ran for these in the late 1970s (originally found here):