I am planning on starting what I call the Ultimate Crossover, (working title) a crossover between five of the most successful franchises of all time, Star Wars, Lord of the Rings, Star Trek, Harry Potter, and Doctor Who (I am willing to add more). The crossover would feature the main protagonists of the franchises (Luke Skywalker, Frodo Baggins, Captain Kirk, Harry Potter, and the Doctor) fighting a team of their respective villains (Darth Vader, Sauron, Khan, Voldemort, and the Master) assembled by Sauron to find the Spear of Destiny to rewrite reality in their image (Think Legends of Tomorrow season 2).
It would have 12 "issues", the first and the last being the beginning and the end, with the rest all showcasing one of the franchises by making two issues being exclusively about the franchise's protagonist/antagonist (For example, one of the Star Wars issues would be about Luke and his role with the protagonists, and the second would be Darth Vader and his role with the antagonists.)
In order to make said crossover more interesting and better written, every issue would (hopefully) be written by a different author, with the two Star Wars issues being written by one person, and the Lord of the Rings issues being written by someone else. Of course, I will probably not find that much people, so if someone wanted to they could write multiple issues.
If you are interested in writing an issue or two, there are some rules-
1. You cannot change the plot. If you think of a better one, then let me know and I might change it.
2. You will have to speak with other writers to make sure they are no continuity errors.
3. If you agree to write an issue, you must finish it. In other words, only agree to write an issue if you will finish it.
If you would like to be one of the writers or know someone who would, please let me know. There is no set due date, so you can join whenever you please. As far as I know, no one has ever made something like this, so I want it to be as successful as possible, so if you like this idea enough then please help make this ultimate crossover as popular as we can.