Sultan is billing itself as India's Biggest 3D Animated Feature Film. They wear that title with honor. The latest news is that Soundarya, who has previously worked in much smaller capacities animated parts of her father's films, wants the film to split between full CG animation and live action portion, enlisting RS Ravikumar, the director of Kamal Haasan's big budget showpiece Dasavathaaram, to helm the live action scenes.
My guess is now that Enthiran is getting ready to release any day now, and Soundarya's big wedding (trust me, it was huge news) has become history, I'd say that father and daughter will be getting back to this one in by early next year. We can only hope.
FYI, this trailer is 2 years old. As soon as something better and newer shows up, rest assured, it'll be here.