Of course, it additionally suits Parker’s necessities. The spell might have been used to move Peter to a brand new universe, one the place his id was by no means revealed, and the place his family and friends might nonetheless be protected. That means ensuring such modifications do not lead to any “butterfly effect”, and will require Dr. Trang to form the brand new timeline to satisfy essentially the most exact situations. decided. It’s additionally one thing that may be affected throughout Peter’s ruts, when the more and more intricate particulars of the want make it extraordinarily troublesome to keep away from some future disaster from taking place.
Another risk might merely be a matter of Dr. Trang having to determine a timeline the place all these situations have been met, moderately than creating a brand new one on her personal. That might additionally clarify why the circles appear to collide within the trailer, in addition to how the intersecting timelines convey again villains from outdated films.