He's been telling everyone in no uncertain terms exactly what he plans to do, for months. This is so that when he actually does it and people lose a ton of money, he's not liable.
But what happened to the pool supposed to prevent Segwit?
I think that he assumed miners would join but the price pump of BTC was too good an opportunity to pass up for most of 'em. Plan B is just buying an f-ton of hash and mining themselves
