User blog comment:FairyRaven/Fairy Tail Chapter 354: Ephialtes, Review and Commentary/@comment-7418318-20131008105428

I think Minerva will be transformed into some kind of monster or monster-hybrid (either way she won't be immediately recognizable).

Eventually she and Erza will battle it out one-on-one again and at first Erza will be beaten up. But then she'll somehow find out that the monster she's fighting is really Minerva, which will flip her nakama-switch on and she starts to beat up Minerva instead.

Once Minerva lies beaten but alive at her feet, Erza will start to go all "You lost because you lack your pride as a guild mage... bla bla yadda yadda NAKAMA! ect." at which point Minerva will start to cry and her transformation will be undone.

And many people (including me) will be sad about all this. :(