There is only one Way, one Truth, one Baptism, and One Gospel.
Ephesians
4:4 [There is] one body, and one Spirit, even as ye are called in one hope of your calling;
4:5 One Lord, one faith, one baptism,
4:6 One God and Father of all, who [is] above all, and through all, and in you all.
The Good News is Jesus and what He did for us on the Cross.
The Gospel of the Kingdom is not a subjective thing where everybody gets to pick their own favorite flavor.
What good news was preached to Abraham according to scripture? Did God told him about Jesus dying on the cross for him?