It's a sad topic. At least it died for a one cause : show how sucessful Operation Sealion is a dead cause.
Yeah. As I understand it from the (limited part, for the sake of my sanity) reading I have done here, the best that can possibly happen is that Germany might be able to launch an invasion of Britain at some point after 1940 and before the US enters the war, if things go differently.
And that's assuming one of those things is the US not entering in 1941, obviously.
Short of that, you have to have a pre-1936 (nevermind 1939) POD.
Or total Britfail, of the sort that has never happened, ever. Even the Glorious Revolution level of resistance ought to be enough to cause trouble.
To be fair to the guy, Sealion isn't totally ASB. All it needs is for Nazi Germany to focus alot more on the navy, which will naturally be detrimental to the army, which leads them to be defeated by France before they ever get close to England... hmm, prehaps everyone is right. Intervention by Godzilla doesn't count as ASB, right?
Well, he's technically not an alien, or a space bat...
I don't think even if they did focus more on their navy they'd be able to do it by 1940. Building up the kind of naval forces necessary for this would take a while - no matter how much in the way of materials one flings at it, ships take time to build.