Please remember that these are rumors. I do believe the information below is accurate.
via Faeit 212 "a must remain anonymous source"
New LotR box is in November. No one knows what's in it, if it's going to be The Hobbit specific, or if there'll be something for The Hobbit but expandable into the War for the Ring etc, it's really hardcore clamped down.
Unless something changed since yesterday afternoon, we're getting CSM and DA before Christmas with the current plan being for both to be in our hands before November.
The rest of the stuff, like plans for waves before the Codex is something I can't comment on. Kroot are getting new models, but in the current version of the playtest they're not in the Tau book (though this could mean they just want play testers to be using a kroot-less army to figure out the flaws and what kroot need to offer... though that's not exactly rocket science).