(This didn't get an OT yesterday, seemed like it has some quirky points to discuss)
Only on Nintendo Switch, and based on the Wii version (which also came to PSP/PS2, albeit all had differences,) updated for Switch by Aspyr and original developer Krome Studios. Will release on April 20, 2022.
Visuals are cleaned up over the SD original (though they're not calling it a "remastered" release), and the Joycon controllers will replicate the Wiimote controls. Includes the 2-player Duel Mode for local multiplayer (though this seems to be split-screen/same-screen, not Switch-vs-Switch link play like the PSP game had.) Does not seem to be an "Ultimate" compilation of all the versions of SW:TFU 6th-gen versions, as there's no mention of the cool PSP bonus material (3 mini-mission modes: Order 66, Force Duel, Historic Missions; and 3 multiplayer modes: Force Frenzy, Rule the Galaxy, Force Out) and no new content added to this Nintendo Switch release.
Official Info said:
Unleash the power of the Force!You are Starkiller, Darth Vader’s secret apprentice, who has been trained to hunt down and destroy the Jedi. Take advantage of devastating Force powers and lightsaber combos to do Darth Vader’s bidding. Similar to the 2008 release on the Nintendo Wii™, use the Nintendo Joy-Con motion controls to truly feel the destructive power of the Force or challenge a friend to a 1v1 in the local multiplayer Duel mode!
**Play as Darth Vader’s "Secret Apprentice"**
Destroy all who stand in your way in your ultimate quest to serve Lord Vader. Discover the untold story of the Secret Apprentice set between STAR WARS: Revenge of the Sith and STAR WARS: A New Hope.
**Unleash Epic Force Powers!**
Just like it’s original release on the Nintendo Wii, players can unleash devastating Force powers and lightsaber combos using the Nintendo Joy-Con’s optional motion controls.
**Local Multiplayer Duel Mode.**
Choose from 27 characters to battle a friend in a local multiplayer mode to determine the galaxy’s most powerful Jedi!
**Travel the Star Wars galaxy.**
Defeat Jedi Masters on familiar worlds, including Cloud City and the Wookiee homeworld Kashyyyk, or at other unique locations like the floral planet Felucia and the junk planet Raxus Prime.