There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
In the special cases that one could think about that, specifically in case of Kruger I would still do nothing because of the prevalent bovine tuberculosis. One thing is spreading it out, introducing it to other places, the other is how dangerous it is for humans (it might have already skipped to humans, but due to its nature of staying dormant for quite some time and the regional specifics to put it mildly, it won't be known).
As for zoos, most will focus on Asiatic lions instead (iirc remember correctly those are not present in north american zoos though) or some sort of legacy population like Barbary lions or are keeping generic african lions from circuses, private keepers confiscations you name it, or some just don't care about conservation that much. It's still good idea in principle, but I'm sceptical about the whole ordeal of importing a lion to a reputable zoo abroad being worth it and to even have a solid chance of going through. Too many would ask "what is in it for me" or have ulterior motives outright beyond just usual impotence you find everywhere these days.
The AI etc. I think lions as a species are not such a priority and it would be more doing it because of them being charismatic megafauna species, there will be species that need help more and where every individual counts, but are not as popular.