Its quite possible that there would be no war with the Low Countries. Hitler attacked them to get to France, and he needed to get to france because he was at war with them. If he's not at war, he can go on building his forces for when he double-crosses the USSR. He might even get Anglo-French support for that, as the general idea in Britain at least was that the fascist nations could be used as a buffer against Stalin.
Then again, war might come when/if he attacked Greece and Yugoslavia, both of which were British allied. In that case, things happen in roughly the same order, though maybe a year or two behind schedule.