Wow, REALLY surprised that nobody posted about this yet:
http://www.famitsu.com/news/201302/07028257.html
^Confirmation of Jonathan, Will A. Zeppeli AND Johnny Joestar!
Out of those three, the original Zeppeli interests me the most (I pretty much indicated as much in my above post
). Still, as I figured, Johnny mainly relies on his horse to move around (though one of those screenshots clearly shows him off the horse.... wonder how THAT works?
).