My guess: Trinity.
1. Next year, prior to COVID, was supposed to see John Wick 4 and The Matrix 4 drop on the same day. NRS and WB have almost never missed an opportunity to place a guest character in proximity to the release of their next big movie or independent game - the only major exception is Spawn, but he's been in the works since forever.
2. I've always believed it would only a matter of time until we saw Neo in Injustice, which that big Injustice 3 leak video said was going to happen, and was in all fairness a lot more elaborate and full of detail than this. Having Trinity as the MK precursor to that - and even if it's a great big lie, having her as the first iconic femme character to appear in an NRS game, would make a LOT of sense and sell a LOT of DLC. From a publicity perspective, it would go a long way in keeping people buttered up for the return to The Matrix that's now been put on hold because of the pandemic. From an "Oh shit, XxXxX is going to be in Mortal Kombat!" perspective, we've had nothing but big buff robots, monsters, serial killers, and Joker, and the formula feels like it's gotten stale now that Spawn is finally here and almost all the "dream characters" have been done. Adding the Matrix to the universes MK/NRS has included in its rotation would invite an entirely new fandom into the fold and freshen up the formula, and also get everyone excited for the appearance of The One whenever they DO go back to Injustice.
3. With the less than great reputation that their gun-based characters have had over the years, sticking ANOTHER ONE on top of RoboCop, Terminator, and in the event there's any validity to the rumors, John Rambo, would be overkill on top of overkill. I would love to see Slade Wilson in MK, but that's only my personal preference, and not a hill I would die on. And if I'm keeping it a Bean, I would pick the Adjudicator over John Wick every day of the week, because Asia Kate Dillon is glorious and John Wick is just Neo through a different lens, but that would never happen . Trinity is not that blueprint. She definitely had her Akimbo gunplay moments, but was mostly VERY well-versed in the acrobatics and hand-to-hand combat. If I were to compare her to anyone to give an idea of how I see her as a character build, it would be Black Canary in IJ2 without the scream. You could build her as a pure martial artist, and retain the There Is No Spoon badassery that Matrix combat entails with moves out of the playbook of a Flash with Trait on, or Nimble Reptile. If she had the means to evade and speed up like that, she wouldn't need guns to put up a respectable fight.
That's my guess and hope for the future.
