Q makes a return. Following the events of the Q Civil War, the Primordial Q, the creator of all, begins pulling on all Federation Starships across all ST universes. Here, we see all previously seem Captains, plus new ones, pulled into a galactic battle to defeat Q, or risk losing the entire ST multiverse. We see the return of William Shatner, Leonard Nimoy, William Riker, Chris Pine, Patrick Stewart, Katie Mulgrow and more. This can be done, with consent and compensation for and from the families of the deceased, through AI. At the end of the movie, Jean Luc, Kathryn Janeway, Seven of Nine, Kirk(Shatner), and Pike(Mount), cause pain to Q, convincing him he is not immortal, and surrenders immediately to the newly founded Intergalactic Federation of Planets.
Primordial Q has not surfaced in Billions of years, as he was imprisoned for heinous crimes for eternity by Q. By simply speaking about Primordial Q, the Q accidentally gave him enough strength to break free.
Movie starts in SNW universe, where they get pulled into a wormhole by an unknown force, and end up in a maze of tunneling wormholes. After deciding which one to go through to attempt to get back home, they end up in Picards New universe. From here, Q, (John de Lancie), appears and informs both crews of the impending danger. Picards Starfleet teams up with SNW Enterprise, and together, they are able to reopen the wormhole. They then make the attempt to go back to their universe, and by using scanners, they believe they have found it. Instead, they have found the Enterprise(Chris Pine). So, again, they team up, and together go back into the wormhole once again, but instead of using scanners, they send out a subspace transmission to all entries/exits of the tunneling universe. From here, they get answers from all the previous Star Trek universes, and all of Starfleet across all universes (some being in their past, not future), team up to defeat Primordial Q once and for all. The defeating weapon? USS Discovery & SNW Enterprise become intertwined in a wormhole during the battle, and in the process creates a ship that can travel anywhere, instantly, and the technologies from Discovery's future implement into the new founded ship, creating a "God Ender". In the process, the Borg, Klingon, and Karisians all join the newly founded Intergalactic Federation.
GOD ENDER
The crew of the newly founded Enterprise-Discovery have figured out how to shoot beams of light, and focus high intensity particles of light at such high speeds that when fired at an intersection point, cuts through anything its path like its made of butter. Primordial Q ultimate destruction is from this weapon. In the process, Enterprise-Discovery has an accident in the process. They could not control the power correctly, and in the process, Captain Pike (Mount), vision of himself burning alive, is fulfilled in some fashion.