Shit, man, I don't know why but I'm dying for a good Nero x Nico AU one shot; no way in hell could they work canonically without a full rewrite of his relationship with Kyrie, but Nico seems like a fun character to have a little fun with between jobs. A one shot scene with Lady between Dante and Vergil is also sounding like fun, AU obviously.
And with my recent playthrough of God of War, I'm also looking to see if someone might take a non-rape plot with Kratos and Freya. Another rewrite, or a hatefuck at best, but the two do have an appeal together before the whole Baldur thing.
Also tempted into looking at Resident Evil but I'm just afraid it would get boring too fast =/