I think a week of AU event would be do-able, because nobody said the AUs have to be pre-made. People could make up AUs specifically for the purposes of the event, with changing things such as, like... with my characters as an example:

- AU where Prima had a lot more success as a Vocaloid
- AU where SONiKA had someone else for a master
- AU where Old Radio Kaito decided to destroy the stuff in his dad's lab because he always hated him anyway
- AU where Portal!Haku got turned into a robot, Caroline style

There's really no limit to what you could do with a little creativity. vOv