How will Gwen and her crew find Miles?

This is the biggest one, right? At the end of Across the Spider-Verse, with Miles Morales missing (to the characters; we know he’s on Earth-42), Gwen puts together a team of Spider-people (including the characters from the first movie who didn’t appear in this one) to go find him. But, where are they going to start? Do they know where the rogue spider the Spot created came from? This feels like it’ll be the focus of act one of the next movie.