Acording to
Tvtome, the following voice actors are returning to reprise their roles from Armada in Energon along side of Gary Chalk and David Kaye: Mark Acheson (Unicron),
Donald Brown (Cyclonus), Jim Conrad (Narrator), Michael Dobson (Starscream's ghost), Matt Hill (Carlos), Scott McNeil (Jetfire), Brent Miller (Hot Shot), Kirby Morrow (Rad), Doug Parker (Tidal Wave), Alvin Sanders (Demolisher), Also Paul Dobson (Sideways) will be returing to voice Rapid Run. NOTE: This site also had Donald Brown listed as the voice for Scorponok but has removed it. This seems rights since he voiced scorponok in Beast Wars.