I can't stop this in individual threads no matter how many times I post it-- so here it is on its own!
Here are reasons why this will not happen:
1. Because it's stupid
2. Plagueis may have books and comics or whatever else attributed to him, but in the new EU continuity*, his only canonical mention is Palpatine telling Anakin about him in some lovely, terrible PT dialog. Which leads me to--
3. Lucasfilm is distancing itself from anything Prequel related when possible. We got a few minor mentions in TFA, and it is still canon-- but it is obvious to everyone that Kathleen Kennedy and JJ Abrams were not fans. Nor was Kasdan. They will base no plot points or references on prequel era stories when possible.
4. At an Q and A during the last Star Wars celebration a fan asked if Plagueis was going to be in TFA and Lawrence Kasdan responded "What? No. Who is that? No."
They DO NOT care about the books or the PT.
* = I admit as a not-expert in the EU canon, I may be wrong about this one.