The Wall Street Journal, in their reporting on Nintendo's recent financial report that released today, talked to Hirozaku Hamamura, chief executive of Japanese game-magazine publisher Gzbrain (which owns magazines like Famitsu). Hamamura, who is known equally for both extensive insider knowledge about the Japanese gaming industry and his loose lips about the same Japanese gaming industry, told WSJ that big games were coming to Switch much later because third parties were surprised by its success.
Specifically, Hamamura says that a lot of heavy hitters one would expect to come to Switch won't be there until 2019, due to the prolonged nature of game development and the dawning realization that the system was not going to be another Wii U over the last seven months.
One third party who got on board quickly with the Switch, Koei Tecmo, struck a somewhat boastful tone last week during a press conference. From the WSJ article:
“We bet big on the Switch as a game changer so we began making games before the Switch’s launch, but many software companies showed reluctance in releasing Switch games before they witnessed the current success,” said Yoichi Erikawa, chief executive at Koei Tecmo.
Source if you want to read more.