So we have Scotty the Squirrel, but why not more options?
BigFoot (watopia expansion)
Brown Bear (falling out of the tree)
Baguette (France/ Paris)
Nessie (Scotland)
White Waving Cat (Makuri)
Big Ben (London)
Statue of Liberty (NYC)
these are just a few ideas, but could add some fun options to choose your Fun Setting. What would you wanna see?
Over a year into this feature that’s been seemingly forgotten about. (I guess because it was meant to be a prank more than anything else?)
I like everything on that list.
Only thing I might add would be something like the Kappa from Makuri
(Jarvis is the bear)
Oh and maybe a TRex for Titans.
I am liking your additions. Makuri is big enough it can have more than one, just like Watopia.
Things like this are simple wins IMO to keep the game fun and interesting.
How about yeti or bigfoot attacks if you stop to get screenshots?
UFO sightings in Watopia - there is a sign warning of it…
I know some people would find longer 1 hour coffee stops enjoyable too, especially if they could use them at any time. 
What about cheat codes to level up quickly or to get drops bonuses? Games often have those and people do point out Zwift is a game. 
That would put those level up bots out of business immediately.
Two I would use:
- Superman drafting when going downhill
- Pop/ride wheelies