The idea is far from new, if the people of Flanders want it let's do it only Brussels should be neutral.
Flanders was already a part of Netherlands for a very long time.

Dutch parliament speaker has bizarre vision for the future of Flanders and Wallonia, and he is not alone

Flanders to the Netherlands and Wallonia to France. According to the chairman of the Dutch parliament Martin Bosma, that would be a good idea. The PVV member made the proposal during a meeting with the French ambassador in early February, NRC writes.
Farid El Mabrouk
Today at 16:13
Dutch journalist Petra de Koning unveiled the proposals in her weekly column in the newspaper NRC on Tuesday . Martin Bosma suggested during a dinner with the French ambassador to the Netherlands and a number of members of parliament that it would not be a bad idea to include Flanders. France could then get Wallonia. To the surprise of those present.

He is not alone
Whether Bosma was joking or meant it is not entirely clear. The Speaker of the House gives few or no interviews. "On such an evening, politics are discussed and things that could possibly happen, yes," he told the NRC .

Bosma is a radical right-wing politician from Geert Wilders' party. However, he also does not agree with the proposal. His party leader has previously made similar statements. "That is indeed a position that Wilders has already expressed when he visited Vlaams Belang in Antwerp," says Petra de Koning.

The Greater Netherlands idea – also called Dietsland in nationalist circles – is an idea that lives among right-wing parties and organisations. Vlaams Belang was once in favour of Flanders joining the Netherlands, but no longer talks about it.

Die Happier
Bart De Wever (N-VA) also spoke out in favor of it not so long ago. "I have never let go of the dream that all Dutch speakers would one day live together again in one community. If I could die as a Southern Dutchman, I would die happier than as a Belgian," he said four years ago in interviews on July 21, the Belgian national holiday. Things can change. In the meantime, De Wever is the political representative of Belgium as prime minister.

READ ALSO. Bart De Wever wants to reunite Flanders and the Netherlands: “I would die happier as a Southern Dutchman than as a Belgian”

But left-wing politicians have also expressed themselves as Orangists in the past. Such as Minister of State and former Leuven mayor Louis Tobback.

Despite Bosma's statements, few or no one in the Netherlands is concerned about the Greater Netherlands idea, Petra de Koning adds. The claim that American President Donald Trump is making on Greenland or the Panama Canal may give some people ideas.