I have some more details about the set from a very reliable source. The set is actually called the Assault on Hoth (75098) and it will be a Ultimate Collector Series set. Pretty much everything that was shown in the mini movie will be in the set minus the AT-ATs. You can see some of the stuff in the screenshots I took above and below. Han is also shown riding the Tauntaun as well as a small Wampa cave with the Wampa bigfig and Luke hanging out.
Finally as far as the release date? I’m not sure about that but I was told that it would be released in August for New Zealand so I’m guessing it might be a May the 4th set since LEGO has traditionally released UCS sets around that time.