It doesn’t sound like something I’d be interested in, but who cares? Write it anyway.

I hate it when people say “no one will read it”. That’s untrue for most things. There is at least one other person who will read it and like it out there. If nothing more than for you to finally get it out there and on paper for your own satisfaction of doing it. And even if no one else does, it doesn’t matter.

It doesn’t sound like you’re doing this in hopes of being the next Jack Kirby or Stan Lee or to get rich. It sounds like you just have a story you think is cool that you’ve been sitting on for a while and you want to flesh it out. Go for it. Spend some time and get it out there and then release it for others to read.