So what was the reason why we got no new games in 2015? Lack of creativity? Laziness? They were too busy working on Sun and Moon?
Or something else?

They actually could of pulled it off if the past is anything to go by with them releasing three games consecutively for three years.

>Ruby and Sapphire 2003 (New Generation)
>FireRed and LeafGreen 2004 (Remakes)
>Emerald 2005 (Enhanced Version)

It could've been...
>X and Y 2013 (New Generation)
>Omega Ruby and Alpha Sapphire 2014 (Remakes)
>"Z" 2015 (Enhanced Version)

Just seems strange to me that they wouldn't want to make more money.