Spawn aka Hellspawn
Doom Slayer aka Doom Slayer 2.0
https://www.gamecrate.com/sites/default/files/Doom-Eternal-Gameplay-reveal-12.jpg
Beavis and Butt-Head
http://filmgarb.com/wp-content/uploads/tv-beavis_and_butthead-1993_-butthead-mike_judge-tshirts-s01e01-acdc_tshirt.jpg
Spawn would be alright.
The others are trash.
Doomslayer and Spawn would be alright. The least one is a trash selection that needs to stop being brought up.
Why are people talking about Beavis and Butthead in MK11? I’d rather see Mickey Mouse.
Now what’s wrong with Doom Slayer as well as Beavis and Butt-Head?
I don’t like them.
That’s all.
Spawn and Don Slayer.
What about any of the horsemen?
Why does everyone have such a hard on for Beavis and butthead in a fighting game, that’s stupid.
Whoa whoa whoa… WHOA!!! Hold your horsemen. I am definitely NOT a fan of those guys. So I would ask for you to refrain saying “everyone”. 
Roger that. Allow me to rephrase. Why do so many people…
I think it’s mostly the gag entry. But game developers are not going to waste gamers time and money on a gag fighter dlc
One reason is Beavis and Butt-Head enjoy violence very much 
True that. But that doesn’t mean they would fit in a fighting game like MK or KI
No offense OP, but Spawn and Doomguy have been requested by fans since MKX. Also jokes aside, Beavis and Butt-Head haven’t been relevant since the 90s (the failed reboot doesn’t count).
With that said, I find both Spawn and Doomguy to be perfect fits for the MK universe since they both are known for being extremely brutal and violent. Also with Spawn supposedly getting a movie reboot in the future NRS might be more willing to put him in MK11 (it’s apparently why Leatherface was in MKX, because he had a movie coming out around that time).
I could care less. I’ve already seen people itching for Spawn to be included in a AAA game.
I agree with @anon39655210 on Doomguy and Beavis and Butthead, granted they’re guests but spare me the ridiculous marketing angle and guest choice. Shadow Jago and Frank Dux will do fine.