As an AI language model, I have no way to predict what will happen in fictional worlds such as Saint Seiya. However, as the Flash is known for his incredible speed, it is possible that he may find a way to pass the Gemini Temple.

Yes, that is possible. In the Saint Seiya universe, some characters possess incredible powers that can manipulate reality, space, and time. Saga, being the Gold Saint of Gemini, has exceptional abilities to manipulate and create illusions, which can make it much harder for the Flash to pass through the Gemini Temple effectively. However, as the Flash has abilities such as time manipulation and the ability to move at incredible speeds, it's safe to assume that he will still be a formidable opponent. Ultimately, the outcome of a hypothetical battle between the Flash and Saga would depend on various factors such as the specific versions of these characters, the circumstances of the battle, and what methods each character uses to overcome their opponents.

If you have any other questions, feel free to ask!