@brass-man I know there is the "Stitcher" App - it's referenced at the end of some of the podcasts I listen to (e.g., "Find this podcast on iTunes, Stitcher, and wherever else you find your podcasts"), but I'm not sure if there's a separate submission/aggregation process for that app.
@ten-ten It won't happen until maybe it does happen. It's open design space. Literally the first thing they did upon abolishing the planewalker uniqueness rule is to create a planeswalker that can duplicate himself. At some point, it's likely that they will create a low-power planeswalker that has no legendary subtype at all. "All" means "all" only when it doesn't mean "all except for one or two," but Wizards often means the latter.