There are rumors that the UCS Hoth Echo Base is just a placeholder for another major UCS set. Reputable people have mentioned this to me, so I'm just throwing it out there. I have hinted at it before and I have wondered why another "Hoth" set would be released right before the new movie releases. If the ice planet in The Force Awakens is indeed Hoth then it would all make sense. If it is not, then a Hoth set would seem like a poor choice at that time.