We thought Croteam had their hands full with Serious Sam 4, but apparently the small studio already have their future planed.
Alen Ladavac decided make a soft announcement of The Talos Principle 2 during his talk at the Nordic Game Conference earlier today. It's worth mentioning that he only said that it's happening some time in the future, so we might not hear further details for quite some time. At least we know it's coming.