Nintendo has not issued any official comment on the listing, leaving the entry unconfirmed.
The Metroid franchise remains one of Nintendo's flagship IPs on the Nintendo Switch.
The most recent major 2D entry, Metroid Dread, was developed by MercurySteam in collaboration with Nintendo and released for Nintendo Switch on October 8, 2021.
The long-running Prime subseries was last in the news following the announcement of Metroid Prime 4 during E3 2017; in early 2019 Nintendo confirmed development responsibilities for Prime 4 had been reassigned to Retro Studios, the studio behind the original Prime trilogy.
Reporting on the Brazilian listing states that the title name 'Metroid Ravenous' was visible briefly in the public classification database before being removed.
In journalistic terms: a title labeled 'Metroid Ravenous' was logged in Brazil's rating system and subsequently taken down, and Nintendo has not confirmed or denied the entry.
That sequence—appearance, removal, and absence of official comment—is consistent with other regional rating-board leaks in the industry, but does not constitute a confirmation of a new release from Nintendo.
For context, regional rating boards such as Brazil's Ministério da Justiça e Segurança Pública are frequently monitored by outlets for early indicators of unannounced games.
Verified information about Metroid's recent release history is public: Metroid Dread launched on Nintendo Switch in 2021, MercurySteam has been the external development partner for Nintendo on the modern 2D Metroid titles, and Retro Studios in Austin, Texas, remains the studio Nintendo named to handle Metroid Prime 4 following the project's reorganization.
At present, the only verified details about 'Metroid Ravenous' are that a listing was posted and removed from Brazil's rating database and that no official announcement has been made by Nintendo.
Interested readers should look to official Nintendo channels—such as Nintendo Direct presentations, Nintendo of America's announcements, and the Nintendo eShop—for confirmed updates.
Universo Nintendo was the outlet that first reported the rating appearance.