To say that Super Smash Bros Ultimate was a massive success is an understatement. Just the base game was a success, and then the DLC kept people invested even to this day over a month since Sora’s arrival. But as of right now, we don’t know if another game is coming. However, if it does, you can expect Masahiro Sakurai to have a somewhat smaller role in it.
This comes from Sakurai himself, as he talked with The Verge and admitted that Ultimate had “too much” of him in it:
“… I’ve been doing too much of the work myself, so I’d need to resolve that, too. The current Super Smash Bros. has too much of my personality poured into it. In order for a long-time series to continue thriving today, we need to think about eliminating the series’ dependence on just one person’s vision.
Of course, this is the way it is now because we weren’t successful in splitting the vision between multiple people before. This would be a challenge for the future and something that needs to be discussed with Nintendo, if there were to be a next installment in the Super Smash Bros. series.”
Sakurai noted in the past that they tried to give Smash Bros to another studio, and that backfired, but hopefully next time around Sakurai will be allowed to take a step back and relax a bit more. We all know he deserves it.