Legion of Doom

Origin
The Legion of Doom wants quite simply the destruction of the Justice League. They also team up to pull off schemes together. It is not uncommon for Flash to respond to a bank robbery expecting to deal with Captain Cold, only to also have to tangle with Grundy and Riddler as well.

They were founded in 2010. Just months after the Justice League was reorganized under ARGUS and the UN. Someone's laundering their loot, arranged the construction of their secret base, and providing them with "stolen" LuthorCorp tech.