Prime Minister Rutte and the right wing Liberals are facing a serious credibility issue, which other parties could exploit. Rutte already promised everyone that they would save a 1000 euros a year total through reducing taxes, costs, whatever. That was 2012 and none of this actually happened, which people certainly haven't forgotten. And now the scandal with the Teevendeal goes on again. He has lost a lot of credibility. Plus, his budget cuts have seriously damaged the healthcare sector, which might not be taken lightly by some.
Wilders and his PVV on the other hand is losing momentum. Trump's succes uplifted him but that storm of emotions has subsided. I happen to have known some people that were seriously considering voting for him and funnily enough all of them said that they were shunned away by his very agressive behaviour against Islam. It's one thing to want to close borders, but another to want to shut down Mosques and ban the selling of the Quran. Of course, their opinions are hardly representative for the general public that are considering him, but it's interesting to note. Plus, Wilders photoshopped a rival politician into a Pro-Islam protest photo and shared it as if it was fact. I don't think people will appreciate that kind of dishonesty and mud-flinging. But we'll see.
As for the left, the collapse of the social democrats has opened a vacuum. I don't think they'll be able to recover in time. Their post as the biggest left wing party might be taken by the Greens, which are doing extremely well in the polls the last few months. The Socialists are considered too polite and weak and the Social-Liberals are still considered too right wing for most pure leftist voters. Or we get a splintered left wing, that is also very much a possibility.