Re: Luke Cage introduced in Avengers 2, Hulk blasted into space
Changing is fine, like say making the experiment linked to the Captain America Super Soldier program. But changing his origin is a bigger deal, making him not a criminal who is experimented on in prison is like turning Tony Stark into a teenager or having Peter Parker be a mutant. Its just different. It changes his motivations.
Zola experimented on all the men Captain America, in the movie, freed, including Bucky who isn't dead because he returns as the Winter Soldier (according to the director). So its a great comparison. Zola used them as Guinea pigs because he didn't care what happened to them. That picture is of Captain America walking them back to base after saving them from Zola.
In the comics Wolverine was abducted and experimented on and turned into Weapon X, a super healing mutant with metal claws and became uncontrollable. In the movie Logan agreed to it but then went mad and escaped. Its the same idea.
Perhaps AIM reasoned that the criminals in prison would join them once they gave them the power. Its not unreasonable to think that a criminal might join a terrorist group if it got them off of death row and away from the death penalty.
Its also not like Luke Cage would be perfectly behaved in prison either, he could be a guy who gets in lots of fights, is surly, bad tempered to the guards and other inmates, and maybe doesn't seem like a Captain America type to the AIM scientists.
using Parole may be illegal, but its a fictional comic book story, people also don't have super powers. And AIM are terrorists who don't care whats legal. So if they had the run of the prison, lots of criminals to experiment on, I don't think it would bother them that it was illegal. And like I said, the criminals either die, or they kill them, or they join them.
Would it help if they showed that Cage wasn't the only success but that AIM killed all the others, and Cage was able to escape them?
I get that you don't like the idea of experimenting on criminals, but that is his origin as much as Captain America being a skinny soldier who is experimented on during WWII or Peter Parker being a teenager who is bitten by a spider, or Tony Stark being a genius rich inventor, or Reed being a scientist, or Black Panther being the King of Wakanda, or Bruce Wayne being the orphan son who saw his parents killed in front of him.