It will be quite big! You can see what changes are coming on the Discord or on my Bluesky account: https://bsky.app/profile/kodub.com
Trees are definitely planned! They should come in 0.6.0 if I can find a good design.
What other scenery blocks would you like to see?
There will be two new official tracks: Winter 4 and Desert 4, but there will also be many community tracks bundled with 0.5.0