This is already a thing, or to be specific it will be a thing. Players can not revive after their death and they will be forced to make a new character. I do not think Edo Tensi will be useful here as after your death the character will be already gone, well not really, the dead body shall remain because as I have read and heard there will be some sort of medical jutsus where super high medical ninjas will be able to, you know, transplant the eyes of the dead body to another shinobi or in other words, transfer the dojutsu if the dead body has one as far as I know.
So if Edo Tensi existed in the game then whenever a player dies and creates a new character that new character would be deleted and the player will return to his old one which is weird.
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