Tony Stark is one of Earth’s top super-science ... deal with S.H.I.E.L.D., giving them first dibs on his groundbreaking technology and use of the Hulk in exchange for providing him a state ...

Some theorists on the internet believe that these wrist devices worn by the Fantastic Four have something to do with the Tony Stark-formulated time-space GPS devices seen in Avengers: Endgame.