You may be correct. This why I believe if he thinks he cannot get a deal or a no deal through parliament, he will suspend it. If however he chooses not to, he may call an election and stand as the PM who tried but could not deliver Brexit due to other MP’s of all parties blocking it (despite promising to deliver Brexit) and asking the electorate for a mandate to make good on the promises previously given. I think Corbyn is a spent force and I would expect Johnson to win a majority.