Yep, the druid should be in the book.
The epub and html files (one stretch goal) I'd imagine will be available for purchase, just like PDF.
Within The Devil's Reach is available from it's creator.
I'd imagine the online monster creator will be available to anyone.
Dark Heart of the Dreamer, World of Dungeons, Number Appearing, and Juntu's Floating Ice Hell will, I believe, remain the property of their creators; I believe at least some of those creators have plans to release their work to the public later on down the line.
The War supplement will probably be available for purchase when it's released.
The color PDF may or may not be available for purchase later on; this isn't clear to me.
Finally, I'd imagine the compendium class and monster books will forever be backer-only.
I think this covers everything; for specific items, you'd need to contact Sage and Adam and/or the creators of the content in question.
- Alex