I don't think Judas preached the ONE gospel but he heard that one gospel from Jesus the same time the others heard it.
And I do not care what you "think"-back it up with the book, chapter, verse, where Judas preached this "ONE GOSPEL," according to you-this "gospel"/"good news" of 1 Cor. 15:1-4 KJV, whose foundation is:
Death
Burial
Resurrection