Of course, if you tried that, Aslan would be *pissed*.
Well, in the premise of the fanfic (and I never got much farther than noodling with the idea so I can't really recall which I chose), Aslan was either a creation of CS Lewis to help deal with his fears about the other side, or was himself an evil entity on the other side misinterpretted by Lewis (perhaps being superficially nice in the hopes Lewis would lure children back). It _was_ for the Supernaturalverse, they even had a dark Santa! ;)