Super Mario Bros. was going to be the last Famicom game before transitition to the Disk System

Coming from a classic 2005 interview with Miyamoto...

When we were first making Super Mario Brothers, the staff at Nintendo were saying “What? Another Mario game?” He had appeared in a lot of different games before that, you see. It had been 2 years since the Famicom was first released, and we were trying to transition to the Famicom Disk System. Super Mario Bros. was actually going to be the final game that we developed for both cart and disk before switching to Disk System development entirely. This is true. (laughs) - Shigeru Miyamoto