What in your opinion are Avengers villains from the past and present that perhaps did not get enough spotlight or were forgotten after one use but who had a ton of potential to get up there to or just below the level of an Ultron, Masters of Evil or Kang the Conqueror? I got to thinking about this after reading the latest arc of Secret Avengers. I could be assuming but I'm sure not as many people read that book as the main ones and it has this new supervillain group called "The Descendants" who just ooze with story potential. Man just the stories I could tell with that group and Ultron, or Vision. Just gnarly. Anyone else love "The Descendants"? What other villains solo or teams do you like?