That bear form with the rocks alone makes it worth maining a Druid and being a tank in Legion. Now with the expansion's first public build online, we finally get a glimpse of some of the Druid's new animal forms.
These forms will change accordingly when using Artifact Weapons. And man, there'll be tons of Artifact Weapons in-game. Some of the models were shown already during Blizzcon, but not the Bear forms. Here are some highlights, and here's the rest (via r/wow).
MMO-Champion has a short clip showing the animated models.