The head of Sky Movies, Ian Lewis, thinks that Star Wars or Titanic could make 2-D to 3-D conversions appeal to the mass market.
“I know everybody is experimenting with it but I’ve yet to see a made for 2D movie where I’ve though the 3D conversion is good enough.
“We’re hopeful for the first half of next year where you have George Lucas releasing Phantom Menace in 3D and Cameron releasing Titanic, and one of those two, or between them, they will crack it.”
Certainly having the 3-D version of The Lion King be a hit helps as well, but animation is generally easier to convert. (via)