Death's Companion
General Ugg Apologist.
You're right @Death's Companion, and that's why the most likely outcome is OTL's: Sea Lion just doesn't happen.
Realistically, the Germans cannot do Sea Lion '40, and Sea Lion '41 is a push. And that's assuming that they don't stick their dick in the hornet's nest of crazy that is the USSR. If they do that, then the Sea Lion is off the table indefinitely. Barbarossa or not, 1940 is too early.
And the UK will have recovered to repel a Sea Lion '41. So That's too late.
So it just doesn't happen. Or Adolf Notler and the Notzis make changes from about 1928, which nobody responds to, and the whole thing gets a bit silly, because the scales have a Maus sitting on them, just to get the Sea Lion across to Kent.
If they'd had literally nowt better to do from the Fall of France until the summer of 1942, then there might have been some plans that had a chance of success, and a modicum of thought put into them. But they had different priorities.
Thanks.
Though...I would have a lot of time for a TL which defies expectations and has the Germans start working on an Amphibious force or doctrine and nothing much comes of it in regards to Sea Lion but those troops and pieces of equipment and thinking instead cause a change somewhere else maybe not necessarily in their intended role. Maybe better opposition to D-Day or the various Med theatre operations due to butterflies including a high command with a better grasp of the concept and priorities? Maybe the British hold more forces back for longer to defend Britain with knock ons in North Africa? I don't know.
I know why Sea Lion is a topic of such debate and I don't know why so many people can't see its batshit nuts but there isn't much really to say about it on its own without drastically changing everything to to get it to a stage where its actually attempted. In the meantime though maybe something more interesting would come about from it.