"The European Union has just agreed an orderly divorce with the United Kingdom," Tusk said. "A few days before the vote in the House of Commons, it is becoming more and more clear that this deal is the best possible, in fact the only possible one."
"If this deal is rejected in the House of Commons," Tusk said, the only options remaining would be "no deal or no Brexit at all."
"I want to reassure you that the EU is prepared for every scenario," he said.

This is not an improvised or casual position, that's not his style. We can infer that Tusk is telling us that the EU Council is prepared to countenance cancelling Brexit.

But don't let me spoil the fun!

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}