I don't like directly making Magic cards for other properties as a general rule so I'm not going to be involved, no matter how you choose to structure your contest, but I can tell you that it's perfectly fine to have an anonymous vote and/or to vote for yourself.
As moderator of this forum, I have run many iterations of the MCC, DCC, and CCL, and I'm sure I'll continue to organize all of these contests many times in the future. However, anyone who frequents CCC&G knows that the big three monthly contests aren't the only competitive custom card threads here. I'm currently running the Mechanic Creators' Contest as a one-off and plenty of other posters do put together sporadic contests. Since these are all done, by myself and others, for the enjoyment of everyone one here, I'm opening this feedback thread to ask what types, themes, and rules of contests you all like and want to see on an irregular but frequent basis. Are there any old contests you want to see revived just like the MecCC was? If so, mention them here.
On that specific note, I would like to run a new edition of the Magic Wars, a large-scale, team-based contest involving the creation of wholly original creature types and allying together to defeat rivals. If anyone has any interest in, or questions about, this event, please feel free to comment or ask here.