The Buick Encore SUV will debut at the Detroit Auto Show next year. There will be an Opel-branded version for Europe as well. The Encore will also be made in China, by the Shanghai-GM joint venture. GM is busy testing the vehicle on Chinese roads which likely means its China-debut will be at the April 2012 Beijing Auto Show.
Power will come from various Opel-designed ‘Ecoboost’-engines, probably 1.6. 1.8 and 2.0. (Maybe a 2.0 turbo..?)