Since is locked below by leblanc, what if after we beat leblanc the seal gets undone and he goes back to runeterra but this time he brings his dead army from afterlife and he controls immortal bastion to become his new body will that work like mmo wise or lore wise

I mean i dunno who actually can fight him beside Asol but he’s on targon and Aatrox is dead (honestly Idk where even is aatrox rn) Also what timeline are we even on are we on Song of Nunu timeline or does it skip depending on what game comes next