Amina Inloes, Amina Inloes is originally from the US and has a PhD in Islamic Studies from the University of Exeter on Shi'a hadith. She is the program leader for the MA Islamic Studies program at the... Answered 7 months ago

Some narrations about the raj'ah specifically mention the return of people from ancient times. Of course, not all narrations about the raj'ah are correct, and maybe those are not correct, but, at least, from what we have, it seems that the raj'ah will include people from all times and not only the time after certain Imams.

However, according to narrations, not all people return in the raj'ah. Only those who have the highest level of faith and highest level of depravity will be brought back to life.