Crazy ideas have their place in the creative process. But if it has it's place in the actual story, well, that depends. I'm sure some stories would need more winged llamas! Some might need a little less of them. Though remember, where there are cat people, there is murder time - fun time!
I read this, at first, as "Llama Croft" for some reason, then I thought to myself, that might actually make a fun parody game, Lara Croft with a twist: Everyone is a Llama.