Yes, there is going to be an expansion called the Dark Avatar, if I am not wrong, one of the devs can correct me on this, I believe that is going to be out around spring time or summer time of this year, or maybe was next year, not sure about that, I read it somewhere in the history of the game I think.

Here is the text

The future..
Galactic Civilizations II was released on February 21st.

Stardock planned at least two expansion packs -- one for Fall 2006 called "Dark Avatar" and another yet untitled.

After that, most of the Galactic Civilizations team would be on Society, Political Machine 2008, and an unnamed fantasy strategy game. Eventually Stardock hopes to do a Galactic Civilizations III.

It also hopes to leverage the popularity of Galactic Civilizations II to boost TotalGaming.net and work with other indie game developers to bring their games to market both digitally and at retail. Galactic Civilizations II helped Stardock put in place the necessary logistics to do a major worldwide launch of a major retail PC game.

Stardock's goal is that by the end of 2006 to have put completed putting together 2 completely independent game development teams. The resources are now in place, it's literally finding the right people (game developers, 3D artists, modelers, etc.). If you are interested in joining Stardock, contact amarshall@stardock.com. It's located in Plymouth Michigan where it is 72 degrees (25C) all year round.

At the start of 2006, Stardock employs over 40 people worldwide with about 30 of them located in Plymouth Michigan. It is still privately held by Brad Wardell.

It says that they are planning AT LEAST 2 expansions for GalCiv2. If this is true then we can all sing together Kumbaya!