Ev. is in a very confusing state so far. Fans wars and such. I doubt that Amy would do solo as she's said before, she can do whatever music she wants with Ev. but who knows. And supposed Ev had been a heavily Amy Lee centered band even when Ben was still around. Even if she did quit Ev, she said she is more likely to lean towards doing Film scores and such.
I think option A, B, and D are possible outcomes. option C can be cross off, since she said she wants to take a couple of years off to spend time being a wife.
If they will released a 3rd album, a lot of the fans won't be supporting Ev anymore due to John and Rocky not being in the band, just like how many fans left Ev when Ben was gone.
But whatever happens, I wish them the best.
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Their cover of The Door's People are Strange is amazing.
People are Strange