I would be willing to bet May, after everyone gets their pledges. Also you might be able to pick up a copy when the game goes back to Kickstarter. There will most likely be a base game + new expansion pledge.
I preordered from miniatures market. I emailed them asking for their current understanding of eta. They told me April. I suppose that jives with MegaCon selling on their website in April. If I receive by May, I'll be thrilled.
Are they talking then about something like a tutorial/play through to help in learning the game? Not sure why that should delay distribution unless they really want to have a hard copy to go with the games.