1. Doc and Marty go back to Atlantis.

2. Doc and Marty from 1985 helps some Proles and Outer Party members from Orwell's 1985 defeat Big Brother.

3. Doc and Marty go to Narnia, during the Golden Era where the Pevensie siblings ruled.

:)

4. Marty has dreams of being Seamus' brother, Martin.

I don't really know enough about Atlantis to do a fan fiction story on that.

I am in the process on working on a crossover story between BTTF and Orwell's 1984, called Down With Big Brother. I plan to follow that story up with a sequal, tentatively entitled Let Freedom Ring.

I'll also work on writing a story about how Doc, Marty, Jules, and Verne go to Narnia, during the Golden Era of The Lion The Witch and The Wardrobe. I have to re-read the book first, though - to refresh myself with some of the charactors and events of that period in Narnia.

Then I would also like to try my hand at writing an AU story, where Marty returns from 1955, to discover that he has an identical twin, named Calvin. Instead of Jennifer accompanying Marty on his trip to 2015, Calvin comes along for the ride.

I would like to then follow that up with a crossover of where Marty and Doc from the 'Trilogy' universe lands in the 'Marty Has A Twin Named Calvin' universe.

That's probably enough for now, but those are just some ideas that I have.