Just wondering if we will be able to get them together as a bundle at a discount? 
Would it really make sense? I mean, these are two different games. Both in the same universe, yes, but not related by story telling nor can they be played together. Not saying that it won't happen, but I don't see a logic behind it. Plus, chances are that Planet Coaster will be eventually replaced by Planet Coaster 2 or something like that.
Companies do game bundles all the time though? Regardless of if the games fit together or not. It's a way for them to say "hey if you like this one game of ours, maybe you'll like the others as well, and we'll even give you a good deal on getting them together".
But I do agree if PC2 is planned, it would make sense to bundle the newer games together.
Sometimes an entire company puts all the games on sale at the same time, and steam promotes them. So they put up a bundle of every single game the company has produced, regardless of if they are relatedTo be honest, I only saw story games and main game and dlc bundles so far. Not saying you are wrong, just that I am actually less expierienced with bundles, wich led to my conclusions.![]()