Thread:Spencerz/@comment-4651179-20130202215413/@comment-1713281-20130203062720

I have no idea. They release one in connection with most major events it would seem. But they also release various Index/Handbook/Reference stuff at random times as well (like Avengers Pets or Marvel Monsters). And I don't know when an official, full-on Handbook will come around again. Those are pretty few and far between.