Maybe they'll show the Federation slowly becoming the V'Draysh, and bring in David Warner, minus makeup, as mysterious high ranking Federation official Mr. Talbot.
The Federation is involved in all sorts of shady activities, collaborating with the Cardassians to control elections, placing Romulan refugees in camps that officially don't exist, firing Admiral Janeway when she investigates the connections and laughing about it with the Cardassian ambassador, and rolling back environmental restrictions on warp research in the name of progress.
Every time Picard tries to speak out against these acts, his words are called fake and he is ignored. He becomes persona non grata to the point that younger Starfleet officers don't even know who he is anymore.
The gaslighting is so pervasive that David Warner, who is at the same shuttle stop as Picard each day, remarks how the building lights have five lights. Picard corrects him saying there are four. Warner smirks and tells Picard, "Sure there are, whatever you say" dismissively. This all seems so horribly familiar to Picard, but in his old age his mind has forgotten his most painful Starfleet memories to preserve his mental health.
Picard overhears a bunch of Starfleet security officers referring to Warner as General Madred, and hears them saying "Hail Cardassia!" Picard records this on his PADD and rushes off to inform Starfleet Intelligence director Tyler (played by Shazad Latif in old age makeup). Tyler says "We'll look into it," then throws the PADD into the incinerator after Picard leaves.
Picard is then shot in the back while trying to send a message to Data. Warner then bends over Picard and says "Hail Cardassia!" Riker walks in, steps past the dying Picard and tells General Madred that the V'Draysh will make the Federation great again. Madred casually asks Riker, knowing the dying Picard is hearing, how many lights there are. Riker says, "Five".
Picard says, "There are four lights," then dies.