Remathilis
Legend
Well, depends on what element's you're emphasizing...
Some elements of Mystara are unique (others have pointed out skyships, red steel, and the Hollow World) but a LOT of Mystara is "X culture with the name filed off". The Northlands (Soderfjord, Vestlands and Ostland) are pretty much analgous to the Scandinavians, Thyatis is a medieval version of Ancient Rome, Ylaruam is fantasy Arabia, Karameikos is a Roman invasion of the Balkins, Ethengar is Mongolia, Heldann Freeholds is Iceland, Darokin is Venice, Minrothand Guilds is Switzerland, and that doesn't EVEN touch the mish-mash that is the Hollow World (From Ancient Egypt to Pirates of the Caribbean!) Even the demi-human nations (Alfheim, Rockhome, and the Five Shires) feel like they could called Rivendell, Moria, and the Shire.
Going by WotC's treatment of the "X culture with name filed off" in the 4e Realms, I don't think there would be enough of Mystara left to put a toe-tag on! WotC's best bet is to borrow elements for its Nerath setting (like the Isle of Dread) and leave the rest untouched; those who like it have it, and what WotC would do to it wouldn't even be worth it.
Some elements of Mystara are unique (others have pointed out skyships, red steel, and the Hollow World) but a LOT of Mystara is "X culture with the name filed off". The Northlands (Soderfjord, Vestlands and Ostland) are pretty much analgous to the Scandinavians, Thyatis is a medieval version of Ancient Rome, Ylaruam is fantasy Arabia, Karameikos is a Roman invasion of the Balkins, Ethengar is Mongolia, Heldann Freeholds is Iceland, Darokin is Venice, Minrothand Guilds is Switzerland, and that doesn't EVEN touch the mish-mash that is the Hollow World (From Ancient Egypt to Pirates of the Caribbean!) Even the demi-human nations (Alfheim, Rockhome, and the Five Shires) feel like they could called Rivendell, Moria, and the Shire.
Going by WotC's treatment of the "X culture with name filed off" in the 4e Realms, I don't think there would be enough of Mystara left to put a toe-tag on! WotC's best bet is to borrow elements for its Nerath setting (like the Isle of Dread) and leave the rest untouched; those who like it have it, and what WotC would do to it wouldn't even be worth it.