Those drawings were made to become paintings. Only the first one representing Frank Sinatra actually became a 20 by 30 inch painting.
The others might turn into something else in the future, who knows ?

Here are representations of Louis Armstrong and Ella Fitzgerald.

These last ones are Thelonious Monk and Ray Brown.

Those last ones aren’t heroes, they’re villains.
Yeah, the googles on the first one are a rip-off of Dr. Horrible. They look cool, that’s all.
The all black character is Dr. Dark, The Beam’s nemesis.