Future Collectibles

With the closed off areas around Sodor hinting at future map expansions, are there anymore collectibles anyone would like to see added? Would you like them displayed similarly to the Bookstore and Gallery at Knapford?

My first current choice would be:
1. More unlockable posters advertising characters and the services they run, I know there are currently 12...or at least I've seen 3 of the 12 are unlockable. I wouldn't mind seeing one for the Culdee Fell line.
2. More Tiles that decorate the map.

 

The rest of the Railway Series books totalling to 42.

 

If they can fix Percys poster that would be a start before adding anything else.

 

I’d rather have all the railway series books in the base game than the whistles (hard to see) or hats (shining time station ) so adding the remaining books with DLCs would be good

 

Star and Zero flags scattered around the harbors to collect. If you know, you know.