The A. C. O. has released a preliminary schedule for the 2010 Le Mans Series season. Only the test session at the Paul Ricard HTTT in March is confirmed, as well as three races: at Paul Ricard in April (that’s new!), at Spa-Francorchamps in May and at Silverstone in September. Two more events are “almost certain”, but the A.C.O. has only released their respective date: 16th of July and November 19th, so we don’t know yet where those races will be held.
My guess is the July mystery event is either Nürburgring or Algarve. I’d say there’s a 75% chance for it to be Nürburgring. As for the November event, that’s too late for it to happen in Europe so I’d guess Le Mans Series will either go overseas to Brazil at Interlagos like they did in 2008. Or, Le Mans Series will assimilate the Asian Le Mans Series Event at Okayama. But Japan is in the northern hemisphere just like Europe and the November weather is not so great. Plus, the A.C.O. is trying hard to make the Asian Le Mans Series a stand alone series so I’d say there’s a bigger chance to see an event in South America.