What happens if Completionist Guise chooses his own character card to replace? I'm guessing it gets replaced and everything after the first sentence of Impressive Collection just doesn't happen because the Completionist Guise card is no longer in play, with Completionist Guise and his collection going back in the box because there's nothing better to do with them?
In OblivAeon mode, can Guise replace an active hero character card with a variant card that is in play as an incapacitated hero? If so, a player could theoretically stick with the same hero deck regardless of how many times they were incapacitated.
In OblivAeon mode, can players choose from the variant cards under Completionist Guise when replacing their hero? I haven't done the math, but I figure the players would lose before Guise could hoard all the variant cards and deny other players the chance to select a hero at all... probably.