Yes it is true!
The first image from Sony Picture Animations' The Smurfs was leaked on the internet yesterday. The movie is in its preproduction phase and will be featuring 3D animation. The film is on track to be released in theatres December 2010. Sony is keeping the Cast under wraps, but there are rumors that Comedy-veteran John Lithgow is said to play Gargamel, sworn enemy of the Smurfs, and perhaps Julia Sweeny as well.
We have not heard much from Smurfland since reruns from the animated TV series stopped running in 1990. It should be interesting to see how Sony Picture Animations portrays these fun-loving characters.
From the Scarface reference in the headline on the poster... looks like this movie may have some adult friendly innuendos, puns and what-not. :)