I think if they release it, it'll be before the second leg of the tour. Wouldn't make sense to release it after the tour is over with, wouldn't have any promotion. That'd be like painting a masterpiece but not even trying to show it to anyone. What's the point, right? & the tour isn't doing THAT good that they'll do a third leg.. so. Either here within the next few months or not at all!
Just a correction - 2010 is the 3rd leg, not 2nd although it may have seemed 2009 was one leg.
I'm sticking with March 2010 release but that's intuition based, nothing else.