Pros:
-I like the fact that you can choose 2 chars to use in some chapters in story. Picking one would lead to a scene depending on your choosing of said char.

-As mention above, said char choosing goes towards the final chapter, as whoever you choose, the 12th chapter focuses on him.

-Felt like an extended ep/movie of the Justice League, which was nice.. for the most part.

-At some times, Dialogue is pretty damn good. Mainly due to voice-acting (obvs) and how interactions work.

-Love how the layout of story mode is, tho it's to be expected from an NRS game.

-Unlike MKX (Unless, again, you have to choose a char to fight in some chapters), you can just sit back and watch as the action unfolds.

-Just like previous NRS story, each chapter focuses on a select amount of chars in the roster. If you don't know how to play a char in story, now's your chance to try em out.

-Brainiac (and his funny-looking Skull ship) are menacing in story. I even love how Brainiac is portrayed here.. except when he loses his cool.

-Supergirl/Kara Zor-El is pretty damn sympathetic here.

Cons:
-But as the last chapter goes, I would have love it if it ends as "Let's stop Brainiac, reconcile, and team up like good times". Instead, it's another Batman vs Superman chapter. Chapter 12 even starts as a "which side are you on" thing, which like I said, focuses on either Batman or Superman, depending on your choice.

-Blue Beetle and Firestorm's chapter is... Pointless as all hell. Why try to contain Superman and have Firestorm try to nuke everyone when Batman came in to stop em and free Superman anyway?

-As soon as each char chapters end (aside from Supergirl, Batman, and Superman), most of them take a backseat just for the story to progress (Best example: Firestorm and Blue Beetle, along with Black Canary and Green Arrow)

-Speaking of Green Arrow, they never mentioned how he's "resurrected", since he's supposedly dead in the 1st Injustice story. And even if he's from an alternate world, they never explain how he got there too.

-Dr. Fate is useless. The Lords within his helmet suddenly side on Brainiac without explanation (which either led me to believe that Brainiac has some way to control them or the Lords are just assholes that believe that someone obviously evil is somehow their "order"). Oh, I forgot to mention that Dr. Fate gets killed off too.

-The Society has no impact whatsoever in the story. None.

-Many chars come and go without explanation. Some are even there for the sake of... just being there (Joker, Reverse Flash, GRID, etc).

-Batman being a prick about his "No Killing" thing, again. Also he's an ass (Not as much as how he was in the Arkham games, but still).

-Gorilla Grodd's apparently Quan-Chi (on how he serves Brainiac) but less interesting.

-Wonder Woman's still riding on Superman's dick, as usual. Also after her chapter is done, she just went from "ah, okay" to unlike-able in a snap.

-Superman still being an Evil Asshole.

-Batman and Robin never EVER reconciled about what happened back then. In fact, they so much ignore each other after the prologue.

-Did I mention that this whole game really likes to tackle the "Batman, killing is what these criminals needed" and "but killing also crosses the
line" a lot? It's getting old pretty fast.

-Damien Wayne... Oh god, where to start with him?
   -You only got one fight with him as Robin (in the opening chapter). The rest, he's Nightwing.
   -Damien went from Boy Wonder to "I'm siding with Superman" in a quick flash. Like, it's so damn sudden.
   -As soon as Damien went evil, he went from cool to this.
   -He has nothing worth of the story after his siding with Superman other than "oh, you get to fight his Nightwing Persona".

-Also, since I beat Injustice 2's story mode, idk if I was tired or had the A/C on (just to fix my PS4's problem of randomly turning off) but I was left with a massive headache afterwards.

Not sure about the winner here (cause M. Bison was fighting God Rugal and all), but love how Bison catched Rugal's Kaiser Wave. Also, Hi there Cyber Akuma.