Always good to read financial reports as the following information was found in it (as reported on TWL)

"The release date of Battlefield 2 has now been set to June 2005. This implies that Digital Illusions will not be making any game releases in the first quarter of the current year.
...
During spring 2005 an upgraded version of Battlefield Vietnam will be launched. It will include the actual game as well as additional material released via Internet."

DICE 2004 Year in Review Report