Just got a response for my request about the unreleased special ships. It's about what I expected:
Thank you for your email, unfortunately the Future Enterprise D has had to be delayed until the 12th shipment and the Borg Cube has been delayed until the 18th, I am sorry for the inconvenience.
With the JJ Enterprise it has not yet been officially released in the US and stores which are selling have imported them from Europe. It should be being released later in the year though.
So, it sounds like we'll be getting everything, just a tad delayed is all. No biggy.
I still find their customer service to be truly excellent. They've answered every question I've ever sent them and I've been pleased with everything so far in general. No complaints!