As others have said, no one knows for sure what is going to happen
Apart from likely a few very well connected (say, to Jihan and Ver) individuals, and I'm certainly not one of them. If you ask me (which seems to be the case), I'm inclined to think that there is more than we are told or allowed to see. We see that the total majority of miners (including Jihan Wu's Antminer) are kinda signaling their support for SegWit2x. At the same time, Jihan promised to come up with his own Bitcoin. Could he and his puppets withdraw their vote at the last minute and actually fork Bitcoin the hard way? I think they can, and what's most scary in all this, they might be accumulating hashing power right now (and might have been doing so for many months already) to release the kraken when the right time comes and quickly bring the opposing chains down to their knees. This is just one of the many scenarios which I don't think of as completely impossible