There are certain things that is just impossible and has benefits because it is impossible. Each era will have a historical figure that would be relevant for that age. One history figure can not be relevant for all the ages. Having said that it's impossible for any technology to bring back any person from the past.It's surely a very hypothetical question. God even isn't doing such miracles today. I can't remember whenever there was an update about a man of God bringing back someone from the past in a kind of miracle. Only science can so something like this now which we barely see.
Yes, with AI technology using deep fake videos and audios, it is very much possible to come up with videos and audios of such figure who have lived in the era where we had audio and video recordings. That does come with the ethical issues too