Better say I am no expert. I really can't tell. The news seems genuine as it is reported in all mainstream media. If they play tricks this way, then there will be no more trust about these Bitcoin thing.
Open source means everyone can start a fork. As long as the miners and trading exchanges collude and proceed with a group of new developers, they may again announce on the 14 Nov:
Segwit2x Is On Track
The developer of segwit2x along with several of the CEOs that supported it (and thus their companies) announced today that Segwit2x has been suspended. The full announcement is here: