A Nintendo representative talked with IGN and told them that the upcoming Mobile games Fire Emblem and Animal Crossing are now delayed. Instead of launching this fall, they will now launch before the end of the fiscal year, which is March 31, 2017. This decision was to get Super Mario Run to the App store first.
Here is their official statement:
“Based on a variety of factors, we felt it was most appropriate for Super Mario Run to launch ahead of these other two apps. Our Animal Crossing and Fire Emblem titles for mobile will launch before the end of our fiscal year, which ends on March 31, 2017.”