I like the tundra idea, and the bus usage. I'd also suggest a jungle kind of area, also with a town or city.
Then doing some quests there, without time limit.
Maybe the quests at one of the areas will make the bus ride free when done, but would be some hard or time consuming stuff we'd need to do.
Maybe having all recipes and make all dishes we'd need to give to them for a bus ticket for free rides.
Maybe for one or two years, then do the same again to get another one or two years for free.
A bundle would be nice, too. And having more secret notes would be fun, too, maybe get those from special ways, instead of the easy way like the others. Maybe from the bundles, which make you do a list of stuff.
Sorry for wanting to do a lot more than just filling a bundle, i just love to play around a lot XD
So glad i use timespeed mod, as that gives me more time to do stuff while having a nice and calm time, away from reallife.
Maybe some puzzles to solve, having a whole list of puzzles, of which each character gets one randomly chosen of.
I put a suggestion on my list (still just on txt, as i collect them), which is about a "corrupted crop", which could be used for that bundle, maybe?
Maybe some sort of curse from The Witch causing a certain unknown crop which wouldn't grow, but stays alive forever, until "that" happens (spoiler related) like we can have randomly, but then it'd be triggered on a day without such happening, when that crop has grown, like the very first happeningless day.
The corrupted crop(cropS if there would be more) would have more uses, but this could be one!
Many people have suggested new areas a lot, so i think we'll get some one day... i think CA is kinda busy with the next update(s), but eventually we may.
Also looking at the update screenshot MIGHT show us a new area, maybe just a small island that has a few things, nothing as special as what these suggestions mention, so who knows? We'll have to see.
Nice idea, OP!