Tony Stark figures out Time Travel
Tony sees a photograph of himself with Peter Parker, which reignites his desire to help bring back those who were lost in the snap. This personal connection motivates him to reconsider the time travel concept. He then has a flash of inspiration while looking at a Stark Industries certificate in the photo, which is upside-down. This seemingly trivial detail sparks his idea to model an inverted Möbius strip, leading him to develop a method for navigating time travel.
