I love obscure villains like the Spot! He has the potential to be a major threat to anyone if he places himself into a darker, evil mindset. He just needs guidance from a true, diabolical villain like the Wizard, Mad Thinker or Kingpin. Imagine the spot as a member of the Frightful Four, that would be awesome!!
During the Dark Reign story arc, Taskmaster and the Hood decided to to bring in a bunch of D-list villains, ex-cons and other Initiative members they felt were expendable into the Shadow Initiative. This group was the first wave of Initiative members to assault a prison in the Negative Zone called 42 that was taken over by Blastaar and his army. This group acted as cannon fodder to soften up Blastaar's forces before sending in the big boys to clean up.
After that move, the Shadow Initiative was no longer considered a secret, black-ops team for special assignments.