Listen, all due respect to esports, but I didn't avoid
real life sports like the plague just so I'd have to concern myself with
electronic sports in my favorite video game series
On the subject of amped up violence potentially weighing MK down, I don't think so. At least from a U.S. perspective, violence (sadly) isn't really taboo here. Showing a nipple, however, would guarantee MK's ruin since we're a bunch of prudes lol
So, no, increasing violence isn't going to damage MK in the U.S. (that ship sailed back in the early 90's). But if NRS were to overly-sexualize their characters or include nudity, then I think you'd definitely see a higher chance of the general populace taking notice and making a fuss.
So long as MK steers clear of the dreaded AO esrb rating, I truly believe its future is secure.