Sounds like the makings of an interesting movie.
They are taking their models too seriously. In fifty years these scientists’ comments will be objects of fun - rather like the comments at the turn of the 19th Century by someone whose name eludes me now to the effect that nearly everything important had been discovered.
There will be no blackhole and no reverse causation or time travel to prevent the “dreaded Higgs Boson from being found - if it exists at all.