Mods are a thing. They got end game content. And they're right here, ready to be added to your game.
But anyway, I'm getting the feeling I'm just repeating myself. Been 4 years without vanilla end game content, sure. Might be 4 more for all you know, and if it is, you can't really change that.
One last thing though: a surprise only really counts as such if you don't know what/how/when it's going to happen. You're trying to get the exact opposite here.