The rumors I have heard are that DHS could overlay TOT or RNR with Guardians of the Galaxy (GOTG) now, but would have to take it out in a few years. Supposedly at some point in Infinity Wars the GOTG characters will appear. As soon as that happens, then Universal's agreement would kick in as it includes all characters associated with the ones they currently have so at that point, the GOTG characters couldn't appear at the WDW parks any longer. Admittedly this is all rumor, but it may be a reason if we find DCA gets it and neither ride in DHS does.