According to Le Matin, the newspaper of Lausanne, LS will have a new stadium by 2015. The stadium will be constructed down by Lac Leman and should be about 5 degrees C warmer. It appears that the city and the canton have passed off on it. All the details should be announced 12 March. http://www.lematin.ch/sports/football/ls-signe-match-nul-frigo-247428
actually, the reconstructions around the old stadium have started since this year, but the stadium(s) have not been touched yet there have been several votes but finally it has been decided to have quite a small stadium of 13k places and should be UEFA category 3. I think it's going to be the J.A. Samaranch used by Stade Lausanne-Ouchy http://www.stades.ch/Samaranch-photos.html where it is going to be