No news on volume 4, which is worrisome because volumes 1 and 2 were announced together. That means Vol 3 might be the only movies we get for another 3-4 months. Moonraker...
Things can change of course. The rumor I've heard regarding Volume 4 is that it would contain The Man With the Golden Gun, Licence to Kill and...Quantum of Solace. Strange given that Sony has rights over QOS and Casino Royale, the latter which saw very different DVD releases in terms of style, packaging, menus, etc, than the Ultimate Editions from '06.
Again, that's a rumor, so take it with a grain of salt.
As usual, you know where to go for 007 news and updates!