It's possible if community will swallow it. Segwit2x comes with no replay protection, so you by default can't choose what chain do you want to use after the fork. But I believe that the outcome of this fork will be decided by exchanges - most of them supported Core in their statement about possible BU fork, so if they will take the same stance about segwit2x and will split coins for users, the price of both chains will be decided by trading, which will probably lead to dumping of one chain and rendering it unprofitable to mine. So, if community overwhelmingly supports Core, segwit2x will eventually lose.