Well, Meech Lake was a constitutional crisis--issues of constitutional significance are decided by the provinces, and require unanimity. That ain't likely to happen. Parliament has no say in those matters.
Harper has successfully gotten a prorogation twice. On the first occasion, he was just weaseling out of a challenge to his authority, and he meekly backed down before Parliament came back, without admitting that he'd done so. You see, in a Westminister style of government, cabinet ministers have far more power than do cabinet secretaries in our government, and the executive has in some respects more power than does out executive. A minister can set policy which has a profound effect on citizens, without a vote in the Paliament--such as tax code, or labor regulation. Those are things which would require Congress to act in our system. So, for example, the Finance Minister (and nobody in Harper's government acts without his knowledge and consent--everybody does what Stephen Harper tells 'em) torpedoed an equal pay for equal work provision for women, and some policies about public sector workers which had the force of law. He was in the **** for it, nobody was happy. So he convinced the Governor General to prorogue Parliament, and then quietly dropped those policies before they came back. The electorate being what it is, the outrage was past its due date.
But the last time he pulled that ****, the NDP and the Liberals were prepared to jerk the carpet out from under him in a perfectly constitutional and reasonable manner by forming a government by coalition. Instead, Harper convinced the Governor General to prorogue Parliament, forever blackening the reputation of a woman who had been highly popular until that time. She's been replaced, and no one really knows if the new Governor General would grant a prorogation. But, if Harper comes back from the election with the most seats, but a minority government, and his budget is defeated, the traditional remedy is for the other parties to have a shot at forming a government, and the Conservatives would be out. Harper is too much of a megalomaniac and a bully to let that happen, so he might well ask for a prorogation. If he did, and the GG granted it, people would be outraged, especially younger voters. Harper has a pretty arrogant attitude about the attention span of voters and their outrage--but he may well be fouling the Conservative nest with younger voters, who formed Facebook groups and set up online action groups the last time this happened. Maybe he's right--but then again, maybe he's short-sighted and he's digging the grave of the Conservative Party. It all remains to be seen.
I seriously doubt that he'll get a majority, but it would not surprise me to see him come back with more seats. The Liberals have been a bunch of stumblebums for the last several years, and it seems that nobody has a very high opinion of the Liberal leader, Ignatieff, who would presumably be the Prime Miniister if a coalition formed a government. The New Democrats don't have the seats to form a government, and the Bloc is not a national party. We live in interesting times.