Seems like that’s the last one they’re doing though
Officially, all Dr. Seuss films after Grinch will be at Warner Animation, starting with Cat in The Hat.
Both Illumination and DWA have pretty full plates for the next 5-6 years.
Indeed.
To sum up some of the projects in the works.
Illumination: Grinch (Nov, 2018); Pet's 2 (July, 2019); Minions 2 (July, 2020); Sing 2 (Nov, 2020); Nintendo/Illumination Mario Project (No date given)
DWA: Dragon's 3 (March, 2019); Everest (Sept, 2019); Trolls 2 (April, 2020); Crood's 2 (Sept, 2020); Baby Boss 2 (April, 2021); Spooky Jack (Sept, 2021)
There also lies for DWA, the in-development Shrek reboot, so it depends on what they decide going forward. But for that said, Seuss should be done at Universal's Animation studios for the time being after Grinch.
I do think the question of a Grinch attraction depends on the success ratio of the film in it's box office and critical response.