We have a different sense of imagination and the scale at which Disney can operate. An attraction focusing on Hoth, that included some ice or snow, would definitely be feasible. Building a forest (or a jungle)is definitely something Disney could handle.

First, I would not build a land dedicated to a movie franchise in a theme park that includes lands dedicated to ideas - like fantasy, adventure, tomorrow.

If I had to concede that the addition of a Star Wars land was necessary, even though several locations elsewhere in the park include Star Wars or will be infused with Star Wars, I would have you enter under a bridge, so you have a sense of entering a separate galaxy even as a pedestrian. Then you would see the Cantina (not a cantina, but the Cantina). From there I would use the format that gives rise to Disneyland and most of the lands - the hub and spoke. You would be able to visit Hoth, Endor, and several other planets, perhaps those not yet named as separate elements of the land. In similar fashion, Tomorrowland allows you to go into space, the ocean, and the future. Each transfer from hub to spoke would be created to give you a sense of traveling to another world - some familiar, some part of the new trilogy perhaps.

Dare to dream.