Will most of humanity be in hellfire or heaven? Will most of humanity eventually be taken out from hellfire? Would those taken out include atheists and polytheists?
Allah (SWT),The Most Merciful, The Most Just, knows who is entitled to be in the Hellfire. We are read in Quran that the enemies of Allah will remain in the Hellfire as they were insisting on doing wrong forever.
We should not waste our time in searching what will happen to others, rather trying our best to save ourselves from bad deeds and sincerely doing good in faith and practice to be with the Righteous in the Paradise.
Hadeeth says: The Paradise in the ultimate place of the believers in Allah الجنة للموحدين
Wassalam.