After recently watching all 13 films I came up with an idea that could potentially breathe new life into the film franchise in which Star Trek (1)4 is a crossover between the Kelvinverse cast and TNG. Basically I've come to the conclusion that the reboot is flawed because of all the major events that will now unfold very differently because of Nero. V'Ger, the Whale Probe. These two incidents alone are unaffected by Nero and the Kirk and co of this timeline are very different people to the ones who faced off these threats. What I'd like to see is a story where the events of Nero's meddling begin to interfere somehow with the Prime Universe. The 24th century portion of the story would be set at the time of the supernova that ultimately destroys Romulus and threatens the galaxy (who came up with the idea of a single supernova threatening the galaxy?). Picard is still a captain and in command of the USS Enterprise E, about to retire from Starfleet to live his remaining years as a vintner at the Picard vineyards in LeBarre following his brother & nephew's deaths. He is lamenting the fact that his career has stalled and he will finish his career as captain whilst Will Riker is an admiral and his superior. The crew including B4 gather aboard the ship for Picard's imminent retirement when they have to head off to deal with the supernova explosion and its aftermath. In the Kelvinverse 23rd century Kirk and co also have to deal with the consequences to the timeline and somehow through 'Star Trek' the two crews from two different times & universes somehow work together and stop Romulus' destruction as well as transforming the Kelvinverse back into the Prime Universe.
The final scenes would then be in the 24th century Picard walks into his quarters one last time to find a package on his bed from Riker. We the audience don't see what it is Riker's bought Picard to wear only that he has a grin on his face. The scene shifts to the Enterprise E's equivalent of Ten Forward where Picard, now an admiral attends his retirement ceremony hands over command of the ship to his successor. Meanwhile in the 23rd century we see Kirk in his quarters. He's talking to his father via subspace on a monitor. The camera pulls back to reveal Kirk's uniform is a little different to what he's worn in the rest of the film. He finishes his conversation and is asked to report to the bridge. Kirk leaves and walks down a corridor that is rectangular rather than circular with doors in bright primary colours. He enters the turbolift and emerges onto a bridge that looks like the one from the classic show albeit with 21st century detailing. Sulu is at helm, Uhura at comms, Spock is in the centre seat which he vacates upon Kirk's arrival and returns to his science station and starts looking through a hooded viewer. Kirks takes his seat and over the address intercraft speaks to first McCoy and then Scotty to check in with them. We see each in their respective domains, again looking like the sickbay and engineering of old with 21st century film-quality sets. We see Kirk giving orders and with the 'Star Trek' fanfare playing in the background the camera pans up through the main bridge down just like in the opening scene of 'The Cage' only in reverse and instead of seeing the Enterprise A introduced at the end of 'Star Trek: Beyond' and presumably used through this film, we see the classic ship, again with 21st century movie-quality detailing flying off at warp. What this does is give the producers two alternative (or complimentary) film options for the future: films in the 24th century aboard the Enterprise E under Picard's successor or 23rd century films with Chris Pine & co now set in the prime universe. The movie poster could have the Beyond and First Contact Enterprises on it with the tag line 'TO SAVE ALL OUR FUTURES THEY MUST SACRIFICE THEIR PAST'.
