No way Universal is gonna give up what they already allowed to have in its parks. Since Disney purchased Marvel, Universal can't bring Marvel characters anywhere in the world in its parks except in Japan and the U.S. East of the Mississippi River, and allowing the Marvel contract to lapse in Japan and Florida would give Disney unlimited advantage. Not gonna happen.
Has Universal ever had something that was considered to be a 'THE MARVEL UNIVERSE' located in Universal Studios Hollywood or Universal Studios Japan? If not, I don't see how according to the contract that Universal Studios could have got exclusivity for the right to have Marvel characters appear in attractions for Spider-Man or other Marvel characters in an amusement park in Japan or in many other locations in Asia including Hong Kong, the Philippines, Singapore, Malaysia, Indonesia, Mainland China, Taiwan, North or South Korea, Vietnam, or Thailand.
I would be surprised if Universal got exclusivity for the right to have Marvel characters appear in attractions to those locations in Asia due to the construction of the Spider-Man attraction in Universal Studios Japan. That attraction doesn't seem like it would be something Marvel would have considered to be a 'THE MARVEL UNIVERSE'. Referring to a second 'THE MARVEL UNIVERSE' section of a Universal theme park, made after the one in Islands of Adventure, the contract available online says "Marvels representation therein will be of at least comparable proportion and like quality to its representation (including as to the retail exposure and promotional efforts of MCA) within THE SECOND GATE at Universal City Florida."
It seems to me that according to the contract if Universal had made actions towards building a 'THE MARVEL UNIVERSE' section to a Universal park in Japan within a certain time period and then built something considered to be a 'THE MARVEL UNIVERSE' section in that Universal park within a certain time period; Universal would then have had got exclusivity for the right to have Marvel characters appear in attractions for all Marvel characters in amusement parks in Japan, Hong Kong, the Philippines, Singapore, Malaysia, Indonesia, Mainland China, Taiwan, North or South Korea, Vietnam, and Thailand regardless if a given Marvel character is featured at one point in time or never featured in a 'THE MARVEL UNIVERSE' section of the Japanese Universal theme park.
It seems like Universal might not have this exclusivity or if they did have this exclusivity they somehow no longer have it.
I think this is the case about that exclusivity in those Asian locations because there have recently been Marvel characters appearing in attractions at Disneyland Hong Kong. So, if Universal never got this exclusivity or no longer has it for some reason, then I think Disney could have an attraction with Spider-Man and other characters of the 'Spider-Man family' appear in attractions at Disneyland Tokyo or in Hong Kong and Shanghai if they wanted.
It seems to me that the concept of Marvel characters that don't appear as parts of attractions in a Universal Studios park being allowed to appear in attractions at other theme parks in the same country is only described in detail in the contract available online as applying to parts of the USA that are East of the Mississippi River. I think it's mentioned in the contract that such a situation would arise if Universal Studios didn't make certain actions towards building another 'THE MARVEL UNIVERSE' section to another USA Universal park within a certain time period and then built something considered to be a 'THE MARVEL UNIVERSE' section in that Universal park within a certain time period.
Such an idea of allowing only certain characters in other parks in the same country isn't mentioned in the contract for Japan. Although, the contract mentions the possibility of coming up with such a regional division for other countries besides the USA, parts of Europe, and much of East Asia. If Universal had built a 'THE MARVEL UNIVERSE' section in Universal Studios Japan, then Disney wouldn't be allowed to build attractions with any previously created Marvel characters or "characters developed or acquired or licensed in the future by Marvel which (x) are marketed under the Marvel Banner or (y) were previously marketed under the Marvel Banner during the term hereof and are subsequently marketed under the Banner of a Marvel Related Company".
If they did get this exclusivity and still have it, then they allowed Disney to build an attraction, the Iron Man Experience in Hong Kong, that features a Marvel character in a location in Asia even though it seems to me they would have the right to forbid Disney from building this attraction.