This is just speculation, but {sorin markov} was printed in magic 2012 and the new one {sorin, lord of innistrad} was printed in dark ascension. Is it possible that wizards would do the same thing with {Nicol Bolas, planeswalker} in this block?
Doubtful
Ravinica was sealed off a long time ago. The supposed lore that i heard was nicol bolas sacrificed his spark to reopen it.
How could you change the master of the multiverse??
Idk, i trust the guy that told me this, but i dont trust his sources since i dont know where he gets his info.
Has anyone heard anything about Return to Ravnica story yet? Like why the guilds are still together, and why they're back at fighting again?
A Bolas reappearance might explain something.