I would hope, in a rare, emergency case like that, your loyal coalitionmate who the team was passed down to would give it back when you returned.
However, when I took over my coalition, tinykitty, last summer, they really could have used a failsafe like this. They were a top 25 coalition and their leader ghosted. No one could get in. The current players didn’t want the responsibility of leadership, and even if they did, the leader was gone to hand it down. The only recourse was for someone to abandon their all time score and let me in, then several members of the coalition had to send tickets requesting leadership be passed to the top scorer who then passed it to me. We could then let the player who left back in after kicking the original leader. It was ridiculous.