I was thinking about a few ideas for this one, including requiring the strips to have a pet, a demonic possession, and a priest, but I settled on the following...
Sequels!
Pretty simple - find a strip you really like, and write a sequel. It can continue the story, be a prequel, be an entirely different scenario involving the same characters... whatever. Make sure you post the original as well as your sequel.
Multiple entries are encouraged, photoshopped entries will be tolerated. Judging will be a bit delayed - I will be spending the weekend in my home town, attending my high school reunion! As such, I will be doing the judging either Sunday night or Monday afternoon... so... well, call it four days, though it may be four and a half.
Have fun.
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