I'm not planning on playing Shin Megami Tensei x Fire Emblem (I'm spending too much money on FE as it is), but I cannot say that I am pleased to find that Lon'qu is a villain. Of course, since it seems that the FE characters are just weird spectres harnessed by the SMT characters, I suppose that it may not be Lon'qu himself that is a villain, just his user. (I haven't done too much research into the game anyway.)
Maybe before the end of the game, Evil Lon'qu may change sides. Ah, well.