GM has published a teaser photo with the Buick Envision Concept which will appear in the flesh at this year’s Auto Shanghai 2011.
The Buick Envision is a futuristic looking SUV developed by GM Shanghai and the an Asia Technical Automotive Center (PATAC), and according to its creators, this concept features a combination of global design and local aesthetics in order to satisfy the tastes of the Chinese market.
The Buick Envision Concept is "dynamic, fluid, quiet and comfortable" with an elegant exterior that is both modern and sporty.
Besides featuring a number of new technologies, the Buick Envision Concept will extract its power from a plug-in hybrid system, with the exact details scheduled to be unveiled at the time of the show.
By looking at this photo it seems like the Envision will also come with Gullwing doors, but will let you know for sure on April 18th, so stay tuned. 

Source: GM