Bringing a beefed-up and rebranded Call of Duty Mobile onto Switch 2 rather than a downgraded Black Ops 7 could make it the most played multiplayer game on Switch 2. Redo the UI/UX for a console feel, increase resolution and texture size, it already has gyro support that's popular on Splatoon, it has all the classic maps, it's free-to-play, and it's already optimized for long battery life.
Don't roll your eyes. Take a moment to think about the implications of "beefed-up, rebranded, long battery life, free-to-play".