A big focus on puzzles, exploration, humor, using the whip for several mechanics other than the grappling hook and make it first person and combat focused into melee instead of in shooting. Hire Harrison Ford for the voice over, use the main theme for the big action set pieces and set it in the '30s.
Non-white sexy female sidekick, choose an European setting (maybe searching something the nazis are also searching from King Arthur, or from the vikings, or finding the Atlantis in the south of Spain) and make sure the bad guya are nazis to avoid retarded woke complains about racism and colonialism.
Other than that, copy Uncharted. Considering all the mentioned stuff, it will result a very different game even if also focus stunning visuals in beautiful environments, some very different exotic locations to discover, cool dialogs, epic action setpieces with huge explosions and the environment falling apart, a typical action adventure mix of combat, narrative and exploration, etc.
I think the main thing that would help to differentiate it from Uncharted and Tomb Raider would be to make it first person, something that would also help to take advantage of MachineGames expertise. Because even if they try to differentiate it with all these things if it continues being third person it will still be an Uncharted clone. But hey, one of the things people miss from MS is to have their own Uncharted and this game would also be the best opportunity for them to get their own Uncharted.
This. Uncharted is an interactive movie
Seems you never played an Uncharted game or don't know what an interactive movie is.