Posting this as a bit of a reminder to recycle, and for some inspiration.
Last year J was Max from Where the Wild Things Are. I bought a white bunting-y two piece fleecy outfit from Old Navy-- the top had ears, already. I made a crown out of yellow felt, M bought a faux fox tail from Etsy at the last minute. The dinosaur feet slippers came from the Gap, J had them already.
I am thinking a similar neutral body suit type thing this year, a felt ruff and head piece, and re-using the tail. Hopefully that will = LION.