One of the latest projects to join Lego Cuusoo is the Jules Verne Train that Doc Brown uses on Back to the Future III. Lego Cuusoo is a place where people can upload their own Lego creations and if they get enough votes, Lego decides if it will build the project in to a real kit and put it out for sale.
The train conforms to Lego Trains Rail system. It can use power functions. It comes with wings that allow it to "fly" just like in the original film.
It was designed by the same group who designed the DeLorean recently (which is already launching as an official kit).
We expect that this project will quickly reach the needed amount of votes, so check out the project over here and add your vote if you want this set to be made in to a real set.