Cadillac DTS to be replaced by XTS, which will be built in Canada alongside new Buick Regal

The days of Cadillac's big DTS sedan are numbered as the plant that builds it will soon be shut down and re-tooled. The Detroit Hamtramck assembly plant that builds the DTS and Buick Lucerne will switch over to building the Chevy Volt in 2010 and the current products are both long in the tooth.
The National Post is reporting that the new Cadillac flagship will be dubbed XTS and will be produced at the Oshawa assembly plant. It will be built alongside an updated Chevrolet Impala, the new Camaro and the Buick Regal. The DTS is a front-wheel drive car, but the XTS is expected to the share the Epsilon II platform with the Regal and the new Impala. As such, it will likely get all-wheel-drive at least as an option. For its part, the Regal will likely be a re-badged version of the Opel Insignia. The report goes on to say that Oshawa will produce a hybrid version of one of those offerings - a gas-electric Regal model is a reasonable bet.
Earlier reports had pegged the next Cadillac sedan as a model that would supplant both the DTS and the slow-selling STS, and although the NatPost article does not speak to this, it is reasonable to assume that the new XTS will result in the phase-out of both model lines. The new model line was reportedly put on hold back in August of last year, but it apparently has once again been given the go-ahead.
The XTS is scheduled to be launched in December 2011, with the new Impala coming in early 2013.