The problem with is that by the beginning of Vic, 1836, there are no open hostilities between Belgium and the Netherlands. In Vic1, the situation in 1836 is represented rather oddly, with Belgium and the Netherlands being at war. A war which then suddenly ends with the treaty of London. Things were a bit more complicated though.
In 1836, the two countries are indeed officially at war, but had signed an indefinite armistice after the Dutch campaign of 1831. In 1831, the Dutch had crushed the Belgian army rather easily, but where pushed back due to a French intervention. The French didn't intervene out of the goodness of their heart though. They actually wanted to annex Belgium. To avoid this and a war with France, the Dutch, receiving no help from its allies, agreed to an armistice with Belgium. Then in 1839, with the treaty of London, the Dutch finally recognised Belgian independence. The French eventually shelved their dreams of annexation due to pressure from the British, who saw Belgium as an ideal bufferstate between the Great Powers of continental Europe.
So I think we can all agree representing the situation off 1836 Belgium in a game is no easy task. Now, taking into account the features already announced for Vic2, this is a rough idea of how it could be illustrated ingame.
- Though officially at war. I'd start the campaign off with Belgium and the Netherlands at peace, representing the armistice. I agree though, that the Netherlands, not recognizing Belgian independence yet, should have the option to continue the war. Thus I'd give the Netherlands a casus belli or "war goal" to annex Belgium and cores on its territory.
- War with Belgium should hold a serious risk for the Netherlands to draw France into the war though. Thus, France starts off guaranteeing the indepence of Belgium in 1836.
- With the treaty of London the Netherlands recognised Belgium's independence, but Vic2 should (and probably will) leave the Dutch the choice not to do so. So if the Dutch agree to the treaty, things play out historically. The Netherlands lose their "annexation war goal" and cores on Belgium and borders get set in a historic manner. If they don't though, the Netherlands declare war on Belgium.
-Other nations that were part of the treaty of London get the choice to sign too. When they sign, they recognise Belgium and guarantee its independence. However, if they refuse and the Netherlands declare war, they get the option to join the Netherlands in the war, with Belgium and those guaranteeing its independence on the other side.
I think this would best represent the situation. History was almost a best-case-scenario for Belgium (except losing a few historical territorial claims), while things could've turned out much worse. Lots of nations backed down to avoid war or because they were otherwise occupied (e.g. Prussia had an uprising in Poland to deal with), but if they decided to push through, things might've ended prematurely for brittle newborn Belgium.
