I find it very humorous that here we are with a new game, and already there are a bunch of posts with "this needs to be" or "they have to give us" or "should be included" in the base game! In six years, nothing has changed!!! You get what you get, my friends, no one "owes" you anything! NOTHING "needs" to be in the base game! They are giving us five interesting themes, with hopefully many more down the road. Wait till the DLC's break, and those same folks will complain that this or that was in the base game for PC1, so why do we have to pay now?!?!
Personally, I would like to see fully complete, identical base pieces in all themes, with of course the individual detail bits and bobs to fill out each set. I was never really a fan of the Pirate set, so I am interested in the Viking set, I just worry that there might not be a lot to it. I would like a toyland/candyland set, think RCT2, a detailed gingerbread Victorian set with real vintage rides like captured airships, etc. I would also love to see more transport, such as omnibuses, a trolley, even horse and carraige! How about elephant and pony rides? (Not PC today, I guess.)
The other thing I DO NOT want to see is ridiculously exagerated giant pieces, (the kraken comes to mind)! Hopefully scaling can work on animatronic pieces as well!