If Bitcoin Cash does not crash on day 1 I see no reason to follow through with the 2 MB fork for Bitcoin. Big blockers will have their coin, why should the other 85% of the Bitcoin community be forced to accept the latency deterioration and centralization of larger blocks?
Big blockers will always find an excuse to cause havoc in the bitcoin community and ruining in the price in the progress. All they want is power. They hate that Core the best developers, so they want to fire them up trying to buy people supporting them by promising cheaper fees.
Now that the market dumped Bitcoin Cash and supported real Bitcoin with segwit, it should be enough, but make no mistake, they will be back with the spam attacks to try to fool people into supporting 2x.