I like the idea of an art contest but also would enjoy a full-colour splash page if you brought one out - getting both the author and the fans to do the work
It would put more pressure on you, but my first thought was a series of oekakes or extras that are not liable to happen anytime soon but things the fans have always been pushing for (ships, events, people appearing, idk)
I really really wanted to vote the cake is a lie, but then realised that even though it would be funny for my geekery I would actually quite like to see a colour page :3
Devious Comments
This could never be a lie!
Btw, I hope you realize exactly what you've done with the 'ask the roommates' journal. XD
Otherwise, cake.
Though as far as the celebration.... maybe we could do ALL 3 OPTIONS AT THE SAME TIME -gasp-