Oppo has filed for another folding device patent. This one not only features a large single display that folds right in half without cutting it in two. Perhaps showing that the company is looking into true flexible displays.
According to the patent there will also be two cameras on-board, with the main camera sporting a dual-lens module. Whether this actually becomes the case is another story.
Do take this filing with a grain of salt, as Oppo may not create a product based on this patent. They also have a previous patent showing a different foldable design, which makes it seem like Oppo is simply applying for as many patents as it can dream up over the next few months.