GOTG is not clear for use at WDW. When they had the movie preview, they were not allowed to use the Marvel name, nor did they use any "special effects" to enhance the preview...it couldn't be anything more than a movie
Disney is NOT allowed to use the name Marvel for marketing purposes in the US, even at Disneyland (Super Hero HQ instead of Marvel Hero HQ, for example). They can market a GOTG attraction, as long as they don't use the word Marvel.
Most Marvel heroes are barred from use in WDW parks because of UOR's contract. Not all Marvel characters are barred by the contract. Disney's legal team has determined that GOTG is clear for use. It doesn't matter what Jim Hill thinks, or whether Universal was involved in those discussions.
The Guardians property has appeared in DHS with official Disney characters (Villains Unleashed, a public event, plus a private event at MK) along with the movie preview. These were not "party princesses", they were Disney performers approved for their roles (and in some cases, shipped in from CA) like any other character performers. The Marvel name can't be used. That doesn't preclude the characters from appearing there or an attraction being built.
Again, WDW1974 knows what he's talking about. GOTG can be used at WDW, which is why the TOT overlay is in development for both resorts. If we're lucky, the WDW version will get killed, but that won't stop GOTG from showing up in the future with a different overlay or a brand new attraction (the ideal scenario).
And as fun as it is to "argue" this with people who have absolutely no clue what they're talking about, I won't be commenting further. Have a ball.