In the end, I went with the starfield but didn't overdo the star
splatter and kept the action lines to a minimum.
The final image is roughly 22"x 17" and took a bit longer than I
thought it would--the cartoony, simplified style relies so much on
line control and placement that it takes longer than one would
imagine! Hopefully she will get a kick out of being placed in the
ranks of the Titans!