Follow ups that show the aftermath [link] of Devil's decision would be interesting. You could show a good, bad, and joke take on the whole situation.
Like good would probably show them completing the snowman Bad would likely be Hulk-Pea, or cause she and Devil seem to hold a close bond, perhaps she would just feel heart broken? (a real emotional take) and for a joke ending you could have it something where Dark Devil splats Devil with a snowball first or something in turn ruining the snowman?
I always enjoy comic like elements from you though, so how about some kinda series of pieces that tell a story? (think more picture book than comic) Perhaps taking some specific scenario like, what if Devil had to calm down a Hulk-Pea, how would he do it? What if someone else had the hots for Thorn, how would Crusher react?
I could probably list some more, but I'd really be interested in how you'd approach any one of these~ as long as your continuing to work your OC's