The DC Universe Online Website announces the launch of update five for SOE's superhero MMORPG, titled "The Fate Of The Fortress," as it concerns itself with Superman's Fortress of Solitude. This forum thread offers the complete patch notes, and the Game Updates page has this overview:

The Fortress of Solitude stands on the brink of collapse. When it falls, our world, and what is left of Krypton's legacy, will go down with it. Left with no choice, Superman must turn to his greatest foes for help, or else lose everything. But even a team of Kryptonians with their limitless power, and Lex Luthor, will not be enough. You and seven friends must join with them in an epic battle to defeat Brainiac. The Universe hangs in the balance.

This latest Group Combat Raid takes you in to Superman's majestic Fortress of Solitude where you will fight against a hoard of Brainiac's devastating Sunstone-powered minions. Destroy them, and come face-to-face with Brainiac's most powerful creation yet – the deadly Avatar of Meta. A wealth of rewards await those who can help turn the Fate of the Fortress.