There’s no confirmed voice cast for LEGO Skywalker Saga, but after Battlefront 2 used the TCW cast, it’d strike me as odd if this game didn’t. The Holiday Special used Matt Lanter, Dee Bradley Baker and JAT for their TCW roles, at least. On the other hand, Droid Tales didn’t use the TCW cast, so there are pre-established LEGO VAs for the prequel/TCW/Rebels characters that LEGO could fall back to (but I for one would be disappointed if they went that route). I definitely wouldn’t expect any actual movie actors - except the eternal Anthony Daniels - because I seriously doubt they’re contractually obliged to do this one.