Will we get that 3.6 liter in Europe too?
New Subaru Legacy Debuts in Japan | NextAutos.com and Winding Road

Looking at the new Legacy I got the idea they hired some Opel and Toyota Engineers that have worked on the Vectra, Insignia and several Toyota models:
010 Subaru Legacy Wagon Revealed For Japanese Market | The Motor Report Auto News Blog

Subaru tried before to be a premium brand, but somehow failed during the process.
Will they succeed this time?
Japan: Subaru Launches New-Generation Legacy and Outback

Would not be a bad idea, to build a H6 3.0 liter diesel hybrid Legacy.
Even in 2012 there will not to much diesel hybrids on the market.

But looking at the seven years they need to introduce a gasoline hybrid I fear it will last to the next Legacy before Subaru will build a diesel hybrid (if ever):
REPORT: Subaru may bring gasoline-hybrid to the U.S. in 2012

Greetings,
SRX!