I've been focused on the "it" being the destruction of Romulas, Picard leads a relief/humanitarian fleet, and something goes sideways. The trailer even features a lot of what I presume are Romulan transports approaching Vulcan. I've read several fan theories on Reddit and other places but they all seem rather silly and, frankly, stupid. But, I saw one Saturday that wasn't quite so stupid after the trailer. Maybe Voyager did actually cripple the Borg during Endgame. Maybe the Federation is dealing with a staggeringly massive refugee crisis of now-suddenly-free drones. Maybe that was the relief/humanitarian fleet Picard was leading and that went sideways. That's...not so bad, especially in light of some information from the Picard exhibit at SDCC that contained a timeline: 2379 - Events of Star Trek Nemesis 2381 - Picard is promoted to Admiral and leaves to Enterprise-E for a "special assignment" 2384 - Picard commands the largest rescue armada in Federation history 2386 - Picard retires from Starfleet 2387 - Romulus is destroyed 2399 - Star Trek: Picard begins So, Picard's rescue armada happens roughly three years before Romulas is destroyed by the Hobus Supernova.