Alan Jim Hanley’s Captain Thunder appeared in his fanzine efforts in the late 1960s-early 1970s.
The name, of course, was the original unused name of Captain Marvel/Shazam. Hanley was always crazy about the then-vanished Captain Marvel.
However, this character, an “alienated” superhero from the 22rd century, was Hanley’s homage to the Marvel style of the Stan Lee-Roy Thomas era. Captain Thunder ran into the remnants of Captain Midnight’s Secret Squadron, as I recall.
“He seemed to owe a little to Captain Terry Thunder of Jungle Comics, as well,” observed Thomas, who has his own version of “Captain Thunder.”
Sam Kujava said, “I found Hanley’s ‘serious’ comic book characters just as fascinating and fun to follow as any of the ‘real’ comic books of the Golden and Silver Ages. I feel that if someone assembled ALL of his work and published it as one big omnibus, fans would be stunned at how much he contributed to comic book lore in such entertaining fashion.”