What if Jarvan I was a skin for Jarvan IV
According to Sion's lore, Sion killed Jarvan I (the king of Demacia at the time), and was then killed in the same battle. Many years later in the time of Jarvan IV, he was resurrected.
But what if Jarvan I was resurrected too?
This could be canon or just an alternate timeline, but I think that J4 should get a legendary/ultimate skin that is a resurrected Jarvan I. It would have a whole new voice, new lines, and new particle effects.
Maybe J1 could be a new champion, but he would probably just be too easily confused with J4 for newer players. Besides, some things just run in the family.
which could work out since they have the same weapons and likely the same skillset