Okay guys you wanted it so here it is, the Ultimate Suicide Squad. I threw in a little bit of insanity, a little bit of terrifying childhood memory, and mixed in a little European flair. This squad is out of this world (one of them is anyway) and they are all absolutely diabolical villains who, brought together as a team, could do pretty much anything they wanted to do.
Predator! (From Predator)
It's obvious isn't it? Predator is a completely bad ass villain, he single handedly took on a whole platoon of huge marines, and killed them all (minus Arnold himself). Trained via an incredibly rigorous process on his home world, he is the ultimate warrior, and the style of fighting/hunting that he uses is ideal for the type of missions any Suicide Squad is likely to find itself on. He is Deadshot mixed with Killer Croc, he's everything that the Suicide Squad embodies in one being. I just feel sorry for the guys that have to put the bomb in his head.
Cruella De Vil (From 101 Dalmatians)
Evil. Pure evil. This woman, nay, this creature is just a symbol of evil for everyone to see. She terrified me as a child, and it's to that end that she takes the second place on this team. If you wanted to get something done, no matter how simplistic, even getting a new coat, for example, wouldn't you want a woman doing it who would end up looking like this before she chooses to fail?
Harley Quinn is kind of like Cruella, except less terrifying, and probably less insane. Honestly I can't see a team of villains going on missions without this woman to drive the insanity level up.
The Child Catcher (From Chitty Chitty Bang Bang)
That's right! An ultimate hunter, like Predator, and a single minded villain attempting to capture something small and cute, just like Cruella. The Child Catcher fits right into this team, and is absolutely terrifying to boot. My childhood was filled with nightmares about this guy bursting in the door and taking me away. If the Child Catcher came around trying to get something, you would just let him have it. He is the sort of villain you need completing missions for the good guys.
Hans Gruber (From Die Hard)
Definitely one of the best villains in movie history. Come on, Hans Gruber is the ultimate tactician, and his voice is perfectly evil to boot. He would totally be the leader of this team. He's used to leading the criminally insane and those with too much strength to know what to do with it. If there is one person who can bring the other three on this team together, it's Gruber. Plus, how could you not have Alan Rickman on a team made up of villains? He's one of the ultimate villain actors!