The Theories themselves.Edit
Remember this, these are only theories, and none of them are confirmed. They aren't real it sometimes is something we want to believe or it is trying to get closure on something that will never be known but one thing you do know is that these cartoons are created for entertainment. The people that came up with them never came up with theories they only wanted to make something other people would enjoy and isn't that what matters as a child you watched most of these and they were great. No need for theories because the one purpose that these cartoons had was to entertain and they did. Don't believe everything you hear.