Well, as absurd as it would be to even shut down one ride given the current state of DHS, I truly can't imagine them shutting down ToT and RnR at the same time.
That said, do you think it's possible that they could be looking to do a GotG overlay at both DL and WDW but using different rides? i.e. change ToT at DCA, but RnR at DHS. That's a lot more justifiable/sensible even though it still has a host of issues.
In terms of "spreading costs", they could convert RnR at both WDW and DLP to a Marvel theme (previously, RnR in Paris was rumored to convert to Spider-Man, but no reason it couldn't be GotG instead). Then when they build the Captain America coaster (or whatever is planned) for DCA's Marvel land, they can duplicate that ride in Paris too to share costs.