I'd say the odds of a Boxed Set comming out would be about %99.99999999999 good. Like a pirate would say; "Thar be money in them thar Boxed DVD Sets! Arg!"
I'd imagine a Boxed Set would be out no later than in time for this Christmas Season, and no sooner than when the 3rd Film gets released. Check out
dvd.ign.com. They usually have good up-tp-date info on DVD releases and general DVD info.