Board Thread:Theories and Speculation/@comment-30241447-20190512072419/@comment-26636534-20190513190544

FlatZone wrote: I think in order to bring back somebody who has died years ago you can only revive that one person, but if you want to revive multiple people they had to have died recently. At least that's how it seems to be.

Maybe that, and also maybe due to Obito only having one Rinnegan? It was not explained why the AoE effect of Rinne Rebirth did not work.