In Nintendo’s financial brief, Nintendo President, Tatsumi Kimishima, reinforced the importance of first party games on the Nintendo Switch. At the same time he confirms Nintendo will put Super Smash Bros. on the Nintendo Switch before the year closes.
It is important that we deliver new titles in our key franchises to all game fans and Nintendo fans who purchased Nintendo Switch during the first year. That is why we announced in a Nintendo Direct presentation in March that we would release Super Smash Bros. (temp.) in 2018. We heard people clamoring for this series to come to Nintendo Switch, so the title announcement in March made a big splash.
You can read the full financial brief transcript here.