In some set photos of filming for Avengers 4, some characters have been seen to wear some circular devices on their hands. Some people have been speculating that these devices may enable these to be able travel to various points in time and/or to travel to different 'universes' where things may be different from the presumably one universe where many things have occurred so far in MCU movies.
www.youtube.com/results?q=infinity+avengers+devices
Similar things have occurred in comic books before and the character of Cable who will appear in Deadpool 2 is known for traveling through time in comic books and has been seen in set photos wearing a circular device on his wrist.
I was thinking that either or both of those characteristics regarding those devices worn in an Avengers movie could also be used for devices that park guests could wear at a park focused on the MCU/Marvel to be used as an explanation for how guests could travel within the park to various areas that are set in different geographic locations on Earth or outerspace, set in different time periods, and/or set in different 'universes'. The devices that park guests could be wearing or carrying with them in the park could actually function similarly to Magicbands. However, there might need to be some sort of physically constructed gateways that might look similar to the Stargate from the Stargate tv shows that guests would walk through when going from an area in the park set in one time period and/or geographic place to another area in the park set in a different time period and/or place. The devices people would wear or carry would still be needed when going with this thinking about gateways. If there was ever a park or section of a park focused on the 'universe' of the past X-Men and Deadpool movies, guests could wear devices that look similar to the device that Cable has been seen to wear in set photos and that might function similarly to the device I have mentioned guests could wear at a MCU/Marvel focused park.
Related to some degree, I have wondered if there has been consideration for making an area of a park similar to Sakaar from Thor: Ragnarok. The fact that there are lots of 'portals' to various places and that time works in a strange way on Sakaar according to the movie seems to mean a given character that might have died much sooner when not on Sakaar than when on Sakaar can interact with characters that might have been born much later than when this mentioned given character would have died if the given character hadn't started to live on Sakaar. Maybe there could even be portals that could take someone leaving Sakaar through either of them to areas of the same universe, but that are at different points in time after the creation of that universe. Maybe there could even be portals that could take someone leaving Sakaar through either of them to places that are considered to be in different 'universes' compared to one another. So if all of those conditions were the case and a park or an area of a park were to be created that focused on Sakaar, guests could enter the Sakaar park or section of a park and meet characters from a multiple time periods of the presumably one universe where many MCU movies have so far taken place and guests could maybe also meet characters that are from universes that different from that presumed one MCU universe.
I wonder if LucasFilm was ever considering having something similar to any of these things in movies and a theme park. Rian Johnson who directed The Last Jedi had previously made a movie that involved time travel and Colin Trevorrow who was considered to direct Episode 9 has previously directed a movie that involved time travel. Having time travel in one of those movies could then be used as the basis for the ideas involving guests and/or characters time traveling in some ways at theme park areas focused on Star Wars. Maybe it's a coincidence however. Trevorrow did direct a quite successful big budget movie with Jurassic World that had Kathleen Kennedy's husband as a producer and Kennedy has experience with some people involved with some Universal movies. So maybe information from some people who have worked with Trevorrow and his experience was influential in him being considered for some time rather than him making a movie that involved time travel.