I think you guys are focused way too heavily on what Palpatine says to Anakin about Plagueis. Ignoring the fact that the producers could simply ignore what Palpatine says and do whatever they want (like they ignored Leia's dialogue about "remembering her mother" when they made the prequels), it would still be very easy to believe that Palpatine was simply not being honest to Anakin.
Nevertheless, I don't think Snoke has anything to do with Plagueis. People are just latching onto Plagueis because he is the only named Dark Lord from the actual movies that we don't really know for sure what happened to.