Notes:

I don't know the context I ask if one day it will make an episode of Scooby-Doo with this vintage comic
Double Trouble (Charlton Comics) batman
Double Trouble is the third of four stories in Scooby Doo… Where Are You! #11, by Charlton Comics. It was preceded by A Mad Mad Mad Mad Man and 200 Years Ago Tonight, and followed by The Ghost of Mean Blacksmith Smith.
Gangsters impersonate the gang while on a bank heist, and during the commotion Velma gets mixed up with her "evil counterpart."