I haven't seen any new Forge objects in it, despite what was said by the panel.

It appears that some of the objects have had their textures cleaned up. Specifically the Coliseum Wall and 5x1 Flat seem to have cleaner, less embellished textures.

Did you notice the other flat islands in the skybox? I wonder what Cortana would say about these being natural formations or not..

Palette seems to be Ravine's, which doesn't bode well for Erosion/Impact pieces being present. I love Impact for the clean textures though, and it looks like Forge Island might have cleaner textures in general.. so it will be an easy transition for me personally if those pieces aren't actually carried over to Forge Island.

And just to emphasize how badly needed this Forge map is, check out the Ravine screenshot in this post by FyreWulff. Room to breathe! We'll finally have it.