It's quite common to have a year of no releases. I wouldn't start spouting doom yet
Red & Green. Released 1996. Next game, Yellow, released 1998. 1997 was a year off
Gold & Silver. Released 1999. Next game, Crystal, released 2000. 2001 was year off.
Ruby & Sapphire. Released 2002. Next game, FireRed & LeafGreen and Emerald, were both released in 2004. Both 2003 and 2005 were years off
Diamond & Pearl. Released 2006. Next game, Platinum, was released in 2008. 2007 was a year off
Black & White. Released 2010. Next game, Black 2 & White 2, was released in 2012. 2011 was a year off
X & Y. Released 2013. Next game, Omega Ruby & Alpha Sapphire, was released in 2014. 2015 was a year off.
4 of the 6 prior generations took a year off after starting a generation. It's probable to happen again