Atomic Robo and the Savage Sword of Dr. Dinosaur — Red 5 Comics
Issue: #3
Majestic 12 tightens its noose around Tesladyne. Meanwhile Atomic Robo is trapped in Hollow Earth where Dr. Dinosaur has, like, five nuclear weapons and he wants to use them to destroy time itself. Probably he'll just poison the entire atmosphere with radioactive dust though.
Creators: Nick Filardi, Jeff Powell, Brian Clevinger
Characters: Dr. Dinosaur, Atomic Robo