The prelude to Champions Online's
latest story arc kicked off yesterday with the release of the SOCRATES Data Cache lockbox. The game's latest dev blog
has all the details, and it mentions something about "a desperate race to save Millennium City."
Lockboxes apparently factor into the arc quite heavily, as they'll drop from monsters but will require a 100 Zen Cosmic Key of Cash Shop Power to open. The arc features five new digitally themed costume pieces.