Prime Nova

Prime Nova is the name of a fictional character in the various Transformers universes.

Marvel Comics
In the Transformers universe, Prime Nova is regarded as the third holder of the Autobot Matrix of Leadership. (Second in the Marvel Comics Continuity.)

Not much is known about Prime Nova, only that he was given the Matrix from Prima. Prime Nova then handed it down to Sentinel Prime.

IDW Publishing
In IDW Publishing's The Transformers: Spotlight issue featuring Optimus Prime, there is a character named Nova Prime, who was a holder of the Matrix before Sentinel Prime. According to Omega Supreme, Nova Prime wanted to expand the Cybertronian race and influence the course of cosmic events. He believed that the Transformers were above other lifeforms and that the universe should be molded in their image. Omega suspects that the first Ark was part of this expansion. Nova Prime's Chief Theoretical Strategist was named Jhiaxus and among his experiments was the first combiner, Monstructor. Nova Prime was aboard the first Ark when it disappeared into the Dead Universe.

In The Transformers: Escalation, when Optimus Prime downloaded his mind into his trailer section to avoid death by Megatron, he had a brief encounter with Nova Prime, leading him to seek answers from Omega Supreme. When he learned the truth in the Spotlight issue, he now knows that the Prime lineage is corrupt.

In The Transformers: Devastation, Galvatron is dispatched to Earth from the Dead Universe by an individual he refers to as Nemesis Prime. It was confirmed in the final issue, that Nemesis Prime was in fact Nova Prime, now leading the Ark crew with unknown plans. He also remarked to Jhiaxus that he was aware of Galvatron's ambitions.

Don Figueroa's illustration of Nova Prime reveals him as a Cybertronian truck with a trailer that can become a defense base (similar to the G2 Laser Optimus Prime). Nova combines with his trailer to become a larger robot with wings.

There was no official toy for Nova Prime. However a fan based designer group Mastercollectables.com had come out and designed a resin based transforming toy based on Don Figueroa's designs.