Gravity Foals: Mystery Is Magic
It was 2012 when Dipper and Mabel left. Now, it's 2017 and the twins are 18. Stan and Ford come back, 67 years old and on and on. But what they don't know is that Bill had a plan before he turned to stone. A plan to take regain Weirdmageddon back with a god from another dimension.
A god of chaos.
From the world called Equestria....
"Stan and Ford are hiding something..."
"Ready for more mystery?"
"You know it"