The Emperor didn’t seem too concerned about the battle itself, in fact I thought he tricked the Rebellion into attacking just so he could get to Luke.
Is that what happened?
I’m pretty sure his main plan was to get rid of the Rebel fleet, thereby the Rebel Alliance in general. He says himself that Luke would have come to him by hos own will at some point anyway.
Giving the fake plans to the Bothans, letting the shuttle past the shield, etc. seem like a ludicrously complicated plan just to get one guy who would have forced himself to confront Vader/Palpatine at some point anyway.
I’m pretty sure his main goal at the battle of Endor was to destroy the Rebel fleet, and Luke showing up at the same time was a predicted bonus (not to mention a plot convenience).I honestly feel like the Emperor isn’t too concerned with Luke at all until Luke shows up on the Death Star.
On the same note, though, I don’t think he was that concerned with the Rebel fleet once they were there, either.
Well, maybe not “concerned”, but they were definitely his military priority at the time. However Luke was definitely his focus at the time.
Since he had everything so well planned out he probably wasn’t that concerned about anything really.
(It’s like Luke said to him; “your overconfidence is your weakness”.)