Huzzah! Please excuse my excitement. I've just recently been caught up enough on Cosmere to hazard a guess at something coming so I'm happy I got it It may not be exact if we're being pedantic, but I'm counting it as a win!
I don't really have any support for this theory but I always assumed that Odium would be defeated by book 5 and the back half main villain would be the equivalent of the Christian Devil in the Cosmere if Adonalsium is the equivalent of Judeo-Christian God.
From the Kickstarter Q&A: "While we expect these books will eventually be available via standard publishing channels, these swag boxes will never be available again."
I wanted to thank you @Smye for making this. I tweaked it a bit to use as a reading checklist. I'm missing some of the upcoming stuff but I add to it as I hear about stuff. It's been really satisfying to tick off stuff as I complete it (all caught up!).
Including a blank version if people want to use it.