After the second episode, I was convinced Luna was hatching a secret revenge plot... But then Nightmare Night happened, ending that possibility forever. I'm still convinced they'll bring Nightmare Moon back, eventually.
" This is kinda what I imagine is going on in the background of the show. "
I do not like the idea of Luna being bad character, I would like her helping mane 6, not get in the way.
If she want revenge, she can prank or troll Celestia all day like I care, but how can she go again those who risk they life to protect Equestria, those who do all dirty work for 2 Alicorns who do not do a think to help them.