I don't think I'll ever be the one to make it, but an online PvP card battle game in this style could be neat. There's probably not quite enough strategy involved for it to be highly competitive, but it can probably get there if a bigger variety of card effects were to be introduced.
I'm planning to add a dungeon crawl focused section in the sequel as well as some additional card battle mechanics to make the different opponents a bit more distinct. There's quite bit more Bastion stuff coming (hopefully) later this year, I just don't know where the new game will need to be uploaded since Bastion is now too spicy for Itch.