Super Smash Bros. director Masahiro Sakurai has recently discussed the future of the series after Ultimate, in an interview with Famitsu.
From the sounds of things, the director is not too excited to make the follow-up to Ultimate anytime soon and when asked, responded "Impossible!", before adding "I'm not thinking about a sequel".
That being said, the director later followed up to suggest "I can't say that this is definitely the last Smash Bros."
Masahiro Sakurai Not Sure if Smash Bros Can Continue Without Him
Super Smash Bros. Ultimate has just finished up with its final DLC character for the game with the addition of Sora from Kingdom Hearts. The developers have confirmed that this character will be the final addition to the roster of characters.
However, Sakurai also told Famitsu (translated via VGC) that he was unsure if he’ll continue with the Smash Bros. series beyond Ultimate, before adding that he wasn't sure if it could continue without his involvement.
“I need to think about whether we should release another Smash Bros. game at the risk of disappointing the users.
I can’t see any way to produce Smash Bros. without me,” he said. “To be honest, I’d like to leave it to someone else, and I’ve actually tried that, but it hasn’t worked out.
If we’re going to continue with the series, Nintendo and I need to discuss and seriously consider how to make it a success.”
Sakurai Also Leaving His Famitsu Column
Other than the future of Smash, Sakurai has also confirmed that he will no longer continue his column in Famitsu after the interview.
Moving forward, Sakurai has not confirmed any next projects as of this interview. We'll have to wait on what the director has in store after commiting so much time to working on Super Smash Bros. Ultimate.