Heard this rumor and frankly it is a terrible idea. Imho. It is implied Boba in the original trilogy was just some random dude who stole the Mandalorian armor an impostor.
Its not as bad as say him being Jango's clone although he already has been overdubbed by that bad actor in 2004. So how can he not be his clone if he has the same voice?
Would prefer they pretend the prequels never happened or were just vid tapes that were made by unreliable narrator's.