The Energon Pub

[Galaxion]

Forget the matrix this is a final showdown between Unicron and Primus which one emerges victoriously? You decide

[Stormwolf]

Unicron, he's already killed Primus in Edge of "Extinction". But then again, Primus got back at Unicron in the Omega point story.

[snavej]

Primus has COLLOSSAL GUNZ so he wins. However, the incredible heat of the GUNZ would destroy a lot of Transformers living on his surface (Cybertron). He would have to make replacements afterwards.