Yeah, Jesus was appointed heir:
Psal. 2:
7 Let me proclaim the decree of Jehovah;
He said to me: “You are my son;
Today I have become your father.
8 Ask of me, and I will give nations as your inheritance
And the ends of the earth as your possession."
... and his brothers as joint heirs with him:
Rom. 8:
16 The spirit itself bears witness with our spirit that we are God’s children.
17 If, then,
we are children, we are also heirs—heirs indeed of God, but joint heirs with Christ—provided we suffer together so that we may also be glorified together.
Beutifully exposed in the Scriptures.