It is disappointing to see an image of the trains leaked, however, it does look they have been tied into the theme well with lots of detail. It will be nice when the side profile is released, to see if the detail continues all the way around
If you look to the right of the image that has been leaked you can see a second train.
The side of this seems to continue with the wicker theme
EDIT: Image added for reference
2nd EDIT: If this is the maintenance shed it doesn’t seem to have any theming at all which is seriously disappointing, unless of course the black screen is covering up something substantial