Oda is slowly revealing the pattern here:
Sun God - 2 in the past, 1 in the present
War God - 1 in the past, 1 in the present
Sword God(Kokuto forgers) - 1 in the past, 1 in the present, 1 in the future
Fair to assume that all gods mentioned in Skypiea will also have the same treatment.
Likely 1 in the past and 1 in the present/future.
The only odd one among them is Zoro's, the one and only, Demon God.