Yes, a 1.8T engine is coming to replace the 2.5 as the 'base' engine in North America (Europe also has a 1.4T IIRC). It is completely unrelated to the 'old' 1.8T. This 1.8T will be all about efficiency and not performance (per se). A new 2.0T engine is coming as well that will deliver more power vs. today's 2.0T. I'm not sure when these will be available, but rumors always point to 'next year.'