I honestly think Cabot was destined to disappear on his second voyage - that, or come home with nothing new to boast. He was going on a very ambitious journey to discover the Northwest Passage, at a time when people didn't know just how far north it was, nor how very impractical for shipping. He could have made the Hudson Bay, and I reckon if his plan went well he would have. However, from there...he's just discovered a colossal inland sea. In order to find the supposed passage he's going to have to essentially sail the entire coastline, that's around 4,500km, before he realises that the only way to keep sailing west is to go even further north, which his ships will probably be incapable of. By this point it would be a miracle if he hadn't lost at least one ship, and he has a pretty huge task getting back out again - for a start, he has to actually find the place he came back in. By this point he's going to have no supplies left and it's going to be getting towards winter, when the storms will be up and the water around him is freezing. In addition, there won't be much in the way of natives to trade goods for food, and fishing will probably be hard work. If he ever returns from that voyage, it's likely to be as a bedraggled survivor with no ship, catching a ride on a fishing vessel from Newfoundland, with no maps or physical proof of his exertions. By far the more likely possibility is that he disappears forever.