All I can think of when I see this is what will PETA say when they see this?
In all seriousness, Fenrir isn't exactly what I would consider primal material for this game. All the primals, with exception of Bahamut and Odin, have an elemental aspect to which they are attuned. Bahamut has always been considered non-elemental as, for as far as I know, he never leaned toward any element. Odin is basically the same though he is widely regarded as Death in Final Fantasy's lore most times.
Fenrir, like Diablos and Siren, doesn't fit into a niche that would be world shattering like the rest. I know, and respect, that he was a huge part of XI's world but moons are not elements thus far in XIV and earth is already taken. His placement will suffice.