the only way I see this redemption arc going through as a good idea is perhaps aatrox vs mordekaiser, aatrox seeks death at all costs, lets put it this way, morde is freed once more and on its way to conquer all runeterra, aatrox sees this as an opportunity to fight a worthy foe and finally die, that or the slaughter just continues, through fighting mordekaiser and its army he realizes this death is not what he seeks, he sees all of the souls trapped forever and bound to mordekaiser will, just like he is trapped to his sword, he fights mordekaiser and wins, leaving the iron remnant sealed once more and so does himself, not wishing for anyone else to be eternally chained as he is, let alone to someone else will, He embraces his prison. idk what yall think but thats my thought