Paradox Interactive and Arrowhead Game Studios is planning a "surprise" related to Magicka during GDC next month.
Per the press release: "So what is the Magicka surprise? We won´t say until GDC. But here is a clue – it is not what you think it is."
Whatever that means. Possibly a console port? An unannounced expansion? Folks dressed as the characters from the game roaming the Moscone Center? Guess we'll all find out in March.
Other games being shown at GDC this year from the publisher are: Mount & Blade: With Fire & Sword, Pirates of Black Cove, Defenders of Ardania, and Supreme Ruler: Cold War.