Ironically now with AI art tech the fans themselves can now carry on the series as they like (including making animated flicks). Not saying this wouldn't violate C&H's IP protections nor that the resulting product will have the same essence but a creative+technically inclined fan tinkering in spare time now has the power to create an all new 'Calvin & Hobbes book' of their dreams. Even if they want to just do it for fun on their own.
Of course, if you were to put in enough effort to make a complete book (ie- 100+ page Sunday comic collections) that could stand among the rest in the original series probably best to adjust your art style, theme and content enough away from the original to make what you are doing essentially a spiritual successor - enabling you to comfortably share it with the outside world.
Of course, if you were to put in enough effort to make a complete book (ie- 100+ page Sunday comic collections) that could stand among the rest in the original series probably best to adjust your art style, theme and content enough away from the original to make what you are doing essentially a spiritual successor - enabling you to comfortably share it with the outside world.