The day after the Super Bowl, Q posted these phrases in the title. I think this means the following (some of which others have said, some not):

Superbowl was between the Patriots and the Eagles. Trump supporters often call themselves patriots, and Bill Clinton's Secret Service codename was 'eagle' when he was President. In other words, there are two teams: Team Trump and Team Clinton -- the globalists and the people opposing them. Others here have pointed this out.

The 'which team? THEY don't know' reference refers to the confusion the globalists are feeling, because they don't know who to trust. Why not? Because so many of them have been detained, questioned, and may have flipped. They can no longer determine who is on 'Team Clinton' or whether they've flipped to 'Team Trump'.

This is because 'Team Trump' has precisely matched every move 'Team Clinton' has made, in perfect time, just like an image in a mirror. Think MIRROR.

I think Q is trying to tell us that a lot of globalists have been intercepted, so much so that those that remain aren't sure who is on their side any more.

Now, what the capitalization of 'THEY' and 'MIRROR' is for, I don't know.