Actually, this is a huge opportunity. The EU really needs an official language. So far, politics have prevented selecting the language of one large member state to the point where there were proposals to select latin. This document shows that English is the de-facto most common language in the EU. After Brexit, there would be less political opposition to make English official, after all only Ireland uses it as its official language so far.
As a German, I would be equally happy if it were French, as long as we finally get an "official" language throughout the EU, but English is much more a likely candidate now, so we should seize the opportunity.
English also is a recognized regional language in two of the three Caribbean parts of the Netherlands (Saba and Sint Eustatius), which means it can be used in communication with the government (https://en.wikipedia.org/wiki/List_of_territorial_entities_w...)
(As another indication of the weird status of these regions, they also have the US dollar as the official currency.)
I have the same opinion. It's a good chance indeed. Establishment of a common second language would greatly enhance the online market in the future, too.
As a German, I would be equally happy if it were French, as long as we finally get an "official" language throughout the EU, but English is much more a likely candidate now, so we should seize the opportunity.