At this height there are no trees in the alps. There is mostly rock and ice. And when the ice melts the rocks loose their connection or the melting extending ice/water let them crack.
From the trailers it seams to be an updated version using the frostbite engine. But not with the full possibilities, so they can't join it to crossplay.
Hopefully with a Switch 2 cause ps4 and xbox one still get this versions.
There were many news in summer that Disney is producing one for Disney+