Only "involved in some form," as expected. No way he's gonna be the protagonist again under this leadership.
Uncharted was mid even before new management ruined it by removing the supernatural element and making it all emotional, thereby destroying the pulp. Although, bringing Elena Fisher back in the second game was a big mistake already. Should have been a new love interest in every game, like Conan (though sometimes there were only men), James Bond and Indiana Jones before it became shit. I did not need to learn about Nathan Drake's personal problems. His brother and Sully as an adult mentor was like the dog, father, childhood, christening of the hat and whip, in Indiana Jones and the Last Crusade. Meaning fucking shit, the end of a good thing: mystery. Tomb Raider made the same mistake after the original trilogy, beginning with her childhood and adult mentor in IV.
I would have introduced real magic in the later games. Cosmic horror. Rather than chemical that makes immortal or zombie again.
The ancient still working mechanical contraptions and giant undiscovered structures became more absurd as the series went on. I kind of still bought it in Uncharted 2, secret hidden in plain sight. Then Uncharted 4, huge island with so many massive structures never seen from space, air or by sea the last few centuries. Uncharted 1 had an island with old civilization too, but it was a bit more reasonable.
Too much to say about the problems with the gameplay. There's a place for simplicity, but in Uncharted it makes playing the game more annoying. I give the series collectively a 3 out of 5.