Coming of T-Metal Cat

HELP!!! I can't decide how to finish this. Options: Leave it B&W, and gray-tones, ot full color? It for a upcoming charity auction. I'm so out of practice ,I'm second-guessing myself at every turn. I was resistant to do Thundercat drawing at all. Especially after the heavy-weight comic artists contributing to cause. I did the T-Metal Cat figure a year or so, back , hintiing at the T-Cats without it being a Thndercats drawing. Now with the Thundercats/Silverhawks crossover, I added the Thundercat type style and added "ghost" figures of Charr, the blacksmith, and Two-Time, the robot, both villians I designed for the show, to hint at future story, where they treturn and team up to create robot to battle the T'Cats/SilverHawks team. Maybe I'm just overthinking it. Any thought?

                          

 Here's the earlier sketch.

I’m leaning toward submitting the original B&W line, than experimenting with a scanned image in digital painting app at my leisure. I’m getting too old to stress out about this stuff.