Lol, why is everyone concerned? This isn't a goal that's too far fetched for Nintendo. They did 300M+ from Fire Emblem alone.If they get 2 games that perform the same way, they're golden.
Nintendo is more than big enough to give focus to both Mobile and their traditional Hardware and Software business. Dragalia lost is a collaboration mostly being handled by a 3rd party and mobile games don't take the same amount of labor to create as a AAA game. They've got this. It'd be silly to continue to ignore the market or not try to get more out of the market like Nintendo's other competitors.