*concerning the God/Devil masks, wtf happened with that plot device? Now there's this mystical mirror(s), but what about the masks?? I NEED TO KNOW
God Mask got taken with Marie when she ascended into the afterlife, if I remember correctly. I assume Gabe still has the Devil Mask since Zobek left it behind.
Mirror of Fate will just be another MacGuffin to use for one game, like the Obsidian & Crimson Stones in Lament. No purpose than to drive one game's plot.
However, if Marie could see into the future that Gabe was going to go all dark and broody evil and hid their son away because of it, don't you think she should have seen that she was...ya know...gonna die and kinda cause it all to happen in the first place? (or is that going to be hand-waved as "A Part of Her Fate" bullshit? I really hate those weak excuses for "deep plot".)