There's actually an
SoB thread in the board game subforum;
http://www.dakkadakka.com/dakkaforum/posts/list/559369.page
Long story short;
Wave One (the two core boxes, and extra sprues for those kits for people getting them, along with the Outlaw Rules (but not figure) shipped in 2014.
Wave 1.5 finally shipped earlier this year, and covered 3 new heroes, a bunch of enemy kits, Cynder, Doorways Into Darkness, and whatnot. It was only sent to backers who paid for this 'middle wave shipping' option, because they originally charged us for 1 wave of shipping, realized that we'd be waiting for *years* on everything if they waited to the end and split it into 2, and then realized that even with 2 waves, there was going to be a LONG wait, but that they couldn't ship 3(+) large boxes to thousands of backers around the world for the $50 or whatever they had charged back in 2013.
The rest will hopefully be delivered around the end of this year. That's the target, but carries a caveat that there's always a possibility for issues or delays outside their control to pop up (printer/mini maker falls behind schedule, rules need tweaking, art need finishing, container gets held up in transit, whatever it might be).
Things are slowly starting to make it to retail as well, but the stuff that was available during Gencon 2015 and wave 1.5 is significantly more than what is found at shops and places like CoolStuffInc.