I dunno, it looks like one this summer. Mario Tennis in June and then Mario Party in October is a pretty long stretch of nothing to me. I'm going to buy Octopath Traveler during that time, but it doesn't feel very well-thought out by Nintendo for their lineup.
That's subjective talk, but objectively there are no game droughts at all, look month of releases of games at link.
And Nintendo clearly says they still did not reveal hole 2018. lineup.