I had been meaning to say this somewhere, but I think resurrection-gone-wrong Minato would make a great final boss. He could use some combination of Orpheus, Thanatos, and Messiah and his normals/specials could have a weapon switching mechanic like Platinum or Gilgamesh or Dante's kitchen sink approach.
Karis said: I take it that Hamuko won't be in the game I presume?
I realize this quote is from 5 months ago, but it really wouldn't make sense for her to be since she isn't "canon". I mean obviously Minato wouldn't be in either, but still. (Well if they didn't care about the plot point they could just shove everyone they want to in the game, which would be awesome.)