Game Freak has applied for a LITTLE TOWN HERO video game trademark in Japan along with the Japanese リトルタウンヒーロ (the same name). This appears to be the new name for the upcoming Nintendo Switch RPG TOWN:
TOWN (working title): GAME FREAK, the developer of the Pokémon series, has created a new RPG for Nintendo Switch. In TOWN, players must take up arms against invading monsters, all within the walls of a single village. TOWN launches for Nintendo Switch in 2019.
Source: Japanese Nintendo
Pokémon Blog 