Thinking of things to try to bridge to the new chapter packs and some new support. I've been wanting to make a plot like this, but it makes more sense as a house-ruled eighth phase:
Phase 8: Each player, in turn order, may choose to give their opponent 4 power and restart the game. Leave all dead, and discarded cards in the dead and discard pile. Return all cards in play and in hand to their owner's deck, then shuffle the deck and go through the whole set up process again, effectively restarting the game.