From what I've gather from others, every time the SW logo was red, someone dies and someone switched sides. I mentioned this to someone else, but what if both happens in Ep8? What if Leia is the one who dies, which becomes the catalyst for Kylo switching to the light side? And what if "The Last Jedi" isn't referencing Luke or only Luke, but Kylo's journey to becoming "The Last Jedi" by the end of Ep9?
You have very interesting thoughts here! I’m reluctant to place too much stock on the colour since I doubt that the people in charge of the design know anything substantial about the content of the film. I expect it’s a more general indication that we’re moving into darker and more intense territory, but I’d really like your idea to be on the money!