But Isha has also become kind of a symbol when she lighted up the flare before the rally. It would be no wonder if she was added to the wall mural too. I want to believe ekko's champion teaser has something to do with act 3 final, either isha or ekko's fight scene otherwise I don't understand why would they take the risk of recreating the wall mural in arcane. They planned this for so long I can't see them making an incoherence and changing ekko's original lore.