Voldorium has surfaced as a new Sega Dreamcast recompilation effort aimed at SoulCalibur. The work lives in the enrique363/voldorium repository, which is where the project's source and progress are being tracked.
SoulCalibur remains one of the Dreamcast's most celebrated fighting games, so a recompilation route for it is a notable direction for the scene. Details beyond the repository itself are still thin: the latest activity is a single commit, f02cfc9e448757670695f011362b3ed2c3d8b191, and no builds, platforms or release plans have been outlined alongside it.
For now, Voldorium is one to watch rather than one to play. Expect more useful information once the repository picks up documentation or a first build.