I never heard anything about Rinzler tackling ESB or ROTJ. Are you sure about this? I think you may be mistaken. Indy is definitly in development--he has said that this is his next project is Lucasfilm lets him, and based on the strong sales and critic reaction to his SW book, I suppose we'll get an Indy book in a few years years.

The Star Wars Vault book comes out in the fall and is a sort of sampling of the Lucasfilm archives Star Wars material as far as I understand. It looks sort of interesting but pricey, but I'll bite because I'm a sucker for this stuff.