Metroid
The Metroid fanbase is so desperate for a new “proper” entry in the series, and while it’s likely that Nintendo will eventually answer their prayers and bring the next blockbuster chapter of Samus’ adventure to the Switch, smartphones would be the perfect platform to take the series back to its roots.
Just as Metroid Fusion on the GBA allowed players to head back into the 2D-side scrolling action that kickstarted the series all of those years ago, Nintendo could do the exact same thing once again on smartphones. With smartphones now capable of running some incredibly impressive games, the beautiful retro visuals, large sprawling map, and epic boss battles would all be a perfect fit for your handheld device.
It may require a bit of a workaround for the controls, but just as Never Alone: Ki Edition, and Rayman have managed to make a smooth transition to smartphones, so too, can everyone’s favorite space-traveler.
