From the announcement article up on StarWars•com: In Star Wars: Maul - Shadow Lord, the Former Sith Returns…
'After the Clone Wars, Maul plots to rebuild his criminal syndicate on a planet untouched by the Empire.
During the 20th anniversary Lucasfilm Animation panel at Star Wars Celebration Japan, surprise guest Sam Witwer took the stage to reveal his return to the galaxy as the star of the next animated series — Star Wars: Maul - Shadow Lord.
Witwer first portrayed Maul in Star Wars: The Clone Wars, later reprising the role in Star Wars Rebels. In a new series set after the events of the final season of The Clone Wars, Maul rises again to lead the underworld factions.
Fans attending the panel in person got an early look at the series’ new animation style with an in-room-only sizzle.
Star Wars: Maul - Shadow Lord is currently in production and will debut on Disney+ in 2026.’
Well, it is content I suppose. Like Mocata, I feel his character has already had a lot of exposure with much of his life already told over the years after ‘coming back from the dead’ ™… and was instead looking forward to something new and fresh for the GFFA.
a 19 minute youtube video on ‘Maul: Shadow Lord’ (and Maul in general) from Star Wars Celebration in Japan:-

Sam Witwer and Athena Portillo | Star Wars Celebration LIVE! 2025 (with Sam Witwer as Maul - so no Peter Serafinowicz)