The rumor is that planned "Opus" has died once again. The comic strip based CG film has seen its share of ups and downs, and if you believe the rumor, it is down once again.
As far as I can recall, the project originated at Wild Brain studios in San Francisco. There was some sort of falling out and the project was taken away from them and thought to be dead. The Weinsteins brought it back to LA for another life in the recent months. Development had restarted and animation tests were in swing. For unknown reasons, the W's decided to pull it again. This is ofcourse a rumor and should be treated as such until something confirms or denies it.
There was an interesting story posted several years ago that outlined some of the problems that Wild Brain went through trying to get their CG feature studio started. Within this story was some interesting information about the Opus project. I'll try to dig it up, as it sheds some light on what this penguin project has gone through.