Spider-Man's ex-girlfriend shows up after not seeing him for years, tells him she has a son, and strongly implies that it's his; he then treats this like a strong possibility... I'm bringing this up because it's the only thing from this DLC that left any sort of impression on me.

The City that Never Sleeps is the worst kind of DLC in my opinion: the kind that just feels like a side-quest from the main game they couldn't find room for, and Spider-Man PS4 didn't have the best side-quests to begin with. This package doesn't expand the main game in any meaningful way: the map is the same, the characters are mostly the same, the combat and gadgets are the same, and the story is nothing special. I have no meaningful takeaways from the whole experience; It's honestly one of those games where I'm struggling to remember what happened minutes after putting down the controller: Our responsible Neighborhood Spider-Man had unprotected sex with a cat burglar, that's all I got.

If you love the main game's gameplay and this comes with it for free, you can try it out; if you have to pay extra for it, don't bother.