Honestly with @vinny having such a busy family life on top of GBE playdates I'd be perfectly fine if they went and grabbed some games that he'd like to finish that he simply can't get around to and played through them. Metal Gear Scanlon is the only real "playthrough" a game content we have right now, and we used to get a bit more. From Breaking Brad stuff, to Dark Souls and Demon Souls, even the old endurance run stuff. I can't forget Bioforge either.
I trust that Alex and Vinny could come up with a few good games/series to go through and beat. The great thing about Vinny is he is just great to watch play really any game with, his natural way of playing through things makes it quite entertaining.