Ripten writes: James Zhang, an artist who has done work for several projects including multiple Star Wars games, had quite a bit of concept art up on his site - JZConcepts.com. A hidden list of links was "stumbled upon" in which there were images for Gladius 2, as well as Knights of the Old Republic 3. Those links are now gone.
The existence of Gladius 2 is further proven by the simple fact that Gladius 2 is listed under "projects" if you click on the client list on his main page. Kinda hard to deny it now, right?