I really hope so. There are a few games that do this well and what I really like about them is they add a bit of dialogue and story and make gameplay more enjoyable instead of playing as a one man army and playing the game all alone. I hope we get either Joel, or one of those characters from 2017's trailer like Lev, Yara or that muscle girl. But from the gameplay alone it seems Ellie is going to be a lonewolf, which is okay for some levels imo.
Games that did this well:
-Bioshock Infinite's Elizabeth
-Skyrim Dawnguard DLC's Serana
-God of War 2018 Atreus
-Mass Effect 1, 2, and 3 squadmates
-Gears of War series
Are there any other games with AI companions in them?