Well, I kinda already knew my answer. In the NT, the masses will burn in hell. Even most Christians. The mass majority of humanity and those of prehistoric times, will burn in hell.
It may not be quite as cut-and-dried as you think...
Romans 2
13 For it is not the hearers of the law who are righteous before God, but the doers of the law who will be justified. 14 For when Gentiles, who do not have the law, by nature do what the law requires, they are a law to themselves, even though they do not have the law. 15 They show that the work of the law is written on their hearts, while their conscience also bears witness, and their conflicting thoughts accuse or even excuse them 16 on that day when, according to my gospel, God judges the secrets of men by Christ Jesus.