You guys appear to have come to a consensus on character choice. Next up...
The plot, of course.
Or, better put, what style this comic will be!
Here's some ideas I have already.
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1. Parody of a video game or movie (You can pick which one, though if I don't know it well I probably won't do it--wouldn't be funny enough

)
2. Joke about the site not updating
3. WTF Comic
4. Question about a plothole in a past comic/short (feel free to suggest what)
5. Death-match style battle (with a twist ending)
6. Discussion with the 'pause' and then some sort of wacky ending/pithy phrase
7. Parody about sprite comics in genral
8. Make up something and suggest that to me!