Not the game, but Karen Traviss will be penning a sequel to the novel Republic Commando: Hard Contact. This one will be called Triple Zero. Here's what The Official Star Wars Site has to say about it:

Announcing Republic Commando: Triple Zero
June 08, 2005
Fans of hard-hitting specialty-clone military literary action have reason to cheer as author
Karen Traviss is set to continue the Republic Commando adventures (inspired by LucasArts' Star Wars Republic Commando video game) in a new mass market paperback due for release in spring 2006.
Star Wars Republic Commando: Triple Zero - the sequel to Star Wars Republic Commando: Hard Contact - is set a year after the battle of
Geonosis, and follows the continuing missions of Omega Squad. As the Clone Wars casualties mount, the commandos find themselves deployed on increasingly dangerous missions that take them beyond the battlefield and further into sabotage and intelligence operations in the heart of Separatist territory. Newly-promoted Jedi Generals Etain Tur-Mukan and Bardan Jusik are also catapulted into front line combat roles and find themselves identifying strongly with the clone soldiers under their command, who turn out to be anything but predictable cannon fodder.
Omega Squad survives a close brush with disaster to end up in the most potentially dangerous hot spot in the galaxy - pursuing a Separatist terror group in the skylanes and underworld of
Coruscant itself, known as Triple Zero in the Grand Army's slang because its galactic chart co-ordinates are 000. And, as any soldier knows, urban operations on your own turf can be the most deadly of all. So it's just as well that Omega Squad find themselves working with Delta Squad, and teamed up again with Etain and Jusik - as well as their legendary training sergeant Kal Skirata, and his secret military intelligence unit of "Null" ARC troopers, the black ops team that even the Kaminoans thought were too dangerous to unleash. It's a critical mission unlike anything any of them have ever tackled - and it tests their friendship and courage to the limit.

Man, 2006 cannot come fast enough. Sqee!

Somehow, I'm not terribly surprised. Karen just made a note on her weblog that Republic Commando: Hard Contact is now in it's SIXTH printing. Man, she's a busy woman.