Ancel told attendees that he's working on a 3D version of the toolkit being used to make Rayman Origins. "It takes a bit longer," he said, "but we're very keen to use this system with this game, because it's an ambitious game and we want to create something exceptional."
Another factor that is stretching out development time: "On this game, we're keeping the team small," he said, "to preserve creativity and so the game doesn't become a commercial product, so that it has soul." This also has the added benefit of keeping the budget low, limiting the chance that Ubisoft will cancel it. Unfortunately, it also limits the chance that Ubisoft execs will know it exists.