@Takaho:
If that was done properly, that could actually be pretty tight.
No, I disagree.
The original series was both action-packed and artistic, revolving around a theme that had the music, plot, characters and art agree together. The ideas that Jack looked at wouldn't work in a movie except for the tired-old tirade, "guy gets sent into post-apocalyptic future, rallies the oppressed and forms an army to oppose the dominant dictator", i.e. the plot of the Jack pilot, a decent episode itself but not really the kind of thing that showcased Jack's skills at all.
Realistically, with the kind of formulaic mindset Hollywood has, the Jack film could go two ways - the super-deformed kids movie, like the Chipmunks, or the Michael Bay movie, like TF. Both are a degradation of the "mature children's show" approach Tartakovsky took to the series, and would imply exaggerations or unnecessary changes that would damage the movie's feel.
In the hands of Nickelodeon, Jack might have a better treatment (depending on the bastardization of Avatar, ofc) but I have my doubts in Warner. If they don't understand their audience well enough to keep shows like that on CN, they definitely don't have the understanding to sell it as a movie.