I didn't think that you would be doing all the sets, I thought each participant could do their own, by starting with the one you've done and modify rotos, restyle bench if wanted, add other props. And given what you have, could probably still do that. I wasn't thinking that it required any effort by you. The bus stop could have a sci fi look, abstract, or impressionist, slum style, primitive stone age cave man bus stop look, etc. Any number of looks. The transition could be part of the animation, if desired. You just know John will want to blow something up.
The bus transition could still be a cut/fadein/out. I thought that this was being edited together externally.
On the other hand by ONLY using 1 fixed set, and it being a story about a particular bus stop, one could still have all sorts of weird and not weird goings on, and the characters could bring their own props.