Unless Bitmain has a million BTC it wants to risk by selling it on original Bitcoin and buying their own fork, then million BTC holder MPeX had years ago vowed he will sell any fork and buy the real Bitcoin. The crowd will follow the leader as everyone wants a Schelling point.
In other words, the miners have no say in the outcome.
But Jihan isn’t stupid; thus presumably he is bluffing. But for what reason?
When the segwit part of seg2x activates, it still will be the original BTC though. Is that going to happen?