It seems there hasn't been a tower challenge in a while. While those are often frustrating for me (I have never beaten it), it seems like they are a good opportunity to get characters and buildings that one might not have, or missed out on from previous challenges. Is there any ideas when the next one might be?
Probably in March a Tower Challenge to promote the Mulan remake. (as happened with the Tower Challenges about Aladdin and The Lion King to promote the remakes, and others also to promote films like Jack-Jack with Incredibles 2 or Christopher Robin with his live-action film.) In addition it is also likely because there are still important characters to be included in the collection, such as Yao, Ling and Chien Po (maybe they can appear on a TC in the style of Shenzi, Banzai and Ed), or Shan Yu.