Nathan Fillion will voice Thundertron Consider this a full blown rumor yet one that makes sense. Thundertron is coming out as a toy in the next month. There is a chance this character shows up in the show. Considering both are Space Captains this makes perfect sense from a casting standpoint. There was news Nathan Fillion is providing voice work for the series of back in October yet no character associated. NYCC 2011 Transformers: Prime Panel - Tony Todd Is Dreadwing, Nathan Fillion To Voice A Transformer - Transformers News - TFW2005 Sorry for maybe jumping the gun but my Gut instinct is this is going to happen.