As to whether a book was disputed or not, all of the books were disputed as is evidenced by ancient and modern gnostics as well as assorted scoffers. This is not to give credibility to the scoffer. True, Luther attempted to reject 4 books from his canon but did not have the authority or backing of true scholarship.
It doesn't matter what "most Christians" think any more than it matters what most gnostics or most anti-Christians think. Truth is truth and it does not depend on the perception of any particular group.
The question of pseudepigrapha has been settled centuries ago. The modern attempt to give the books authority is without reasonable, scholarly or factual basis.
You can't deny the existance of the Council of Nicea or the political influences on canon.