AppleZulu
We've been over this. There is a very low probability that Apple would make a folding iPhone. It's a novelty concept. It would add expense, introduce structural weakness, increase warranty claims, lower customer satisfaction, and add software bloat to configure and run a second screen, and depending on the folding configuration, a different screen dimension. Given the fact that people typically check and fiddle with their iPhones hundreds of times per day, it is a 100% certainty that damage and wear to the screen and folding hardware would result in high failure rates that may be ho-hum for Samsung but would be a certified front-page class-action lawsuit scandal when it's about an Apple product.
Apple doesn't chase "me too" bells and whistles, particularly when the risk/reward calculation would be this dire.
If a folding screen comes out of Cupertino, it will be on an iPad, where the portability advantage would be real, software bloat for extra/nonstandard screens would be unnecessary, and risk of damage from wear or mechanical failure much lower, because iPads are a much less fiddly device that would be folded and unfolded by users a small fraction of the number of times compared to a phone.