9. The Grand Inquisitor's Jarring Return
Surprising exactly no one, Part V comes with the not-really-a-shock reveal that the Grand Inquisitor is alive, despite being seemingly dispatched by Reva back in the premiere.
Of course, this entire development was seen from a mile off, considering the Inquisitor is the main antagonist of Rebels' first season (set just after Kenobi), and there's moments featuring him in the trailer that haven't been shown on-screen yet.
Worse than the fact that this obvious reunion was portrayed as a shock, though, is how it was actually executed, revealing the Grand Inquisitor is alive and well with only a brief line of dialogue about how his revenge kept him alive to explain away his improbable survival.
Sure, this is exactly how Darth Maul returned to the franchise in The Clone Wars, but at least his revival was given some depth and emotional resonance. The Grand Inquisitor coming back receives no such luxuries in this episode.