Prediction: Brexit will be repealed

That should happen in about a year from now, that is before September 2019.
In detail: I think there will be another vote wherein a majority will poll for the UK to stay in the European Union and ending the whole Brexit folly.
It will be a good thing, but it will have consumed a disproportionate amount of time of the political class in Europe, time that should have been used to go forward, instead of thus having been employed for absolutely nothing.