Most people who are aware of The Claw probably know him mostly as the arch-nemesis of the golden-age Daredevil. But The Claw actually preceded Daredevil by about 9 months, having first appeared in SILVER STREAK COMICS #1. Odd that a monster/villain would have his own feature, did that happen frequently in the golden age?
Anyway, The Claw appeared on the cover of PROJECT: SUPERPOWERS #0 and in the 2-page fight scene. Whether or not he will appear again, I don't know. But he was the Daredevil's main advisory for quite awhile, and the 'Devil is a main character in PROJECT: SUPERPOWERS, so...
Here's (not really the origin, but) the first appearance of The Claw.
And that last page! A bunch of nekkid menz fightin' the bad guys. What's not to love!!?
SILVER STREAK COMICS #1 (December 1939)
written by Jack Cole?; art by Jack Cole
You can download SILVER STREAK COMICS #1 (scanned from microfiche) and lots of other awesome golden-age goodness from Golden Age Comics Downloads!