Great question! I'm sure you're not the only commissioner having this dilemma, as the addition of our Keeper Management tools has made it much easier and more interesting to renew a league from previous seasons.
It's actually quite simple to invite a new person to take over a team that was in your league last season. Just follow the steps outlined in this Help article:
Hopefully, you find this information helpful, or it solves your issue entirely. If so, please be sure to mark it as such, so that others will know where to find this information if they're in the same boat.
If you have any other questions, be sure to reply to this thread.