This can be found on TPT, here.
This gives them the chance to come up with some creative short stories, as well as the chance to publish them in a way that doesn't require them to write a bunch of sentences (since they can't at this point in the year). They also practice writing a sentence (capitalization, punctuation, word spacing, etc.) at the bottom of the page (something like "Gary is on the book shelf."). Obviously, this could be adjusted to be more difficult for older kids.
I'll add a picture of completed pages later, when the kids get going with it. We'll see if I need to adjust it, giving them one large frame to draw one large illustration, as opposed to a three-cell comic.
*UPDATE: Led off this morning with the Elf On A Shelf activity. Results were mixed, but I saw several creative comics being drawn. I gave an example, which many students copied the first time, but many came up with something different. I feel that if they are thinking of a creative story, and attempting to organize it and communicate it, it's been a success.