Brexit (Continued)

Two points from today's news.

The Daily Mail headlines reveal that Juncker is boasting that no-one else will want to leave the EU after they see how badly the UK is punished for Brexit.

The problems with making boasts like that are twofold:
Firstly, in order to 'punish' the UK it seems likely that the EU would have to do itself more harm than that which it could do to the UK. Will the other countries who sell us their goods support such a crazy idea?
Secondly, What happens if we do well without being in the EU, as I believe we will? Surely this will encourage other countries to follow us.

The other matter reported today is that Theresa May has chosen March 29 as the day she will trigger Article 50 to start leaving the EU.
My only concern is about what appears to be even more delay; why give some Remoaner time to find an excuse to go to the courts and get an injunction for some spurious reason. If Churchill had fought WW2 with all the delays of the present government, the war would probably still be in progress!