I had the opportunity to speak to Mr. August about Highland as well as his own writing career.
If you have four ideas, all equally viable, I’d recommend writing the one that has the best ending. That’s the one you’ve thought through the most, and the one you’re least likely to abandon midway.
John August has a great article on his website about the idea of writing a script from theme.
This article from johnaugust.com discusses the oh-so-tricky art of revealing just as much information as you need to and finding the perfect time in your script to reveal it.