I remember Morgan boldly claiming that he would drop himself from the World Cup playing XI before a series versus Sri Lanka if there were other batsmen in better form than he was. The way he spoke did not mention a personal slump either, it was pretty much 'if there is someone better equipped to play here, I'll drop myself". And true to his word, he had dropped himself previously and has done so subsequently too.
But those words were famous because he had started that year very poorly and it took him plenty of time to get back into the groove. He also 'dropped' himself for the final game versus Sri Lanka and since those words were fresh in everyone's mind, people were reminded of how important he was to the side irrespective of his personal form when they were soundly thrashed by the Lankan side. It remains their biggest defeat in the last five years of ODI cricket.
Morgan could honestly be England's very own Mortaza and still get into the side as long as his leadership is exemplary and I doubt he would allow England or himself to come to that stage without getting back into form or ensuring that the team is in good hands. The mark of a true leader.