Earlier in June 2024, José Luis Márquez, the Creative Director of Metroid: Samus Returns and Metroid Dread at MercurySteam, gave a talk to students from the Escuela de Videojuegos y Arte Digital (School of Video Games and Digital Art). He was interviewed by the Spanish gaming magazine Gamereactor and discussed his work in the Metroidvania genre. MercurySteam is the only studio in the world to have developed games in both of the franchises that began the genre, Metroid and Castlevania, and this was highlighted. The interview’s topics were the differences between developing Metroid on Nintendo 3DS vs. Nintendo Switch, and Samus’s tendency to lose her abilities at the start of Metroid games.
For some reason, the interview has since been removed from the site, but you can still watch it with English subtitles at the archived link below.
Source: Gamereactor (in Spanish)