I guess if that's the only way we'll ever get to play as horror icons officially licensed. Would rather them outsource it to some other fighting game dev. I don't care much for MK style fighting.
The same boredom you feel for horror characters, I feel for MK characters! And that's okay, we just have different opinions
Also putting aside horror chars, I love the idea of guest characters. The more Killer Instinct becomes Microsoft Smash Bros, the happier I'll be. More guests for every game!!
What I'd really want is Darkstalkers vs. KI as a horror-themed fighter while NRS does an Injustice sequel, but the former isn't happening, and I think the MKX DLC's strongly suggesting that NRS wants to take this route. I definitely wouldn't be opposed, and as awful as WB Games can be, having NRS be owned by WB means that they have a pretty decently-sized library of movies to pull from.
Yes they should. Hopefully that would allow for more traditional MK characters in the next MK game. I like the horror characters enough but would rather see them separate from Mortal Kombat.