Reviews for MK11 are out, but a lot of critics have been giving the game a 7/10, saying the game is super grindy. After reading three different reviews, and skimming a few others, I see a consensus forming. The following review explains the grind best...

https://www.usgamer.net/articles/mortal-kombat-11-review

It's mostly just costumes and intros though. I guess I can live with that. 

Edit: According to https://www.mirror.co.uk/tech/mortal-kombat-11-review-excellent-14444438 there are Microtransactions in the game. 

So the microtransactions come with a game.

IGN - 9
Gamespot - 8

Destructoid - inprogress.

The 3 most important review sites with Destructoid being the best. A Grindy fighting game? Uh yeeaaa? What fighting game series isnt grindy? Your lost Definitely. MK is leader in regards to a fully packed fighter.

I think Smash Bros have it beat. Still lots of content in MK games though.

Oh shit! I forgot about Smash.Smash Ultimate is super grindy as well.

IGN isn't a good review site. They have 30 different writers, and hand out high scores too often. GameSpot stopped being good when they fired their executive editor in 2006 for giving an honest review of Kane and Lynch. 

I am eagerly awaiting the Destructoid review though. Chris Carter is great. That and Easy Allies is always good. 

Blazblue, Guilty Gear, Dragonball FighterZ, Smash Bros. 

Also, just because everyone does something, doesn't make that something okay. 

I mean, that review literally said that it's a fantastic game and that the reviewer had a wonderful time with it.

What they didn't enjoy were the additional modes where you grind for a huge assortment of cosmetic additions.  Just ... don't grind?  Skip that part?

Best review sites, lol. Yep, only when you agree with them.

Fatalities are locked behind that mode. What is an MK game without Fatalities? 

That's probably additional fatalities.