Recently I've been thinking a little more into the V symbol. And I have stopped at three things.
A. What if the biggest meaning for the Roman numeral V in the movie is the introduction to Vector Prime? Could Cybertron be Vector Prime/Primus?

(art by daisorajin)

B. TF5 may also introduce 4 more primes that will be important to the plot.

C. And according to my minimal research the medieval period began during the "V"; or 5th century.
I feel like I'm onto something here, but idk.

I would love to hear other theories here too.

 

^^^^That would be major badassery^^^^

 

woa..

so let's see..

1-optimus prime
2-megatron
3-the fallen
4-sentinel prime
5-primus?

 

I have no idea how Vector looked in G1 but if he looks like that fanart, he has the shapes like the planet thats eating the moon and cybertron in tf3

 

Well unless they throw out the names used from ROTF, Bay said that one of the 6 primes that killed themselves to hide the Matrix, was Vector Prime.

 

I believe Vector Prime was introduced in TF:Cybertron as a major characted,wasn't he?
Though i have a hard time imagining why Vector Prime would visit Earth and start "attacking it"  
My opinion is that he looks to beaten as a planet form to be a good guy.Just my opinion,yet a good theory of yours

 

Vector prime is mostly depicted with a giant hole in the chest, like galvatron in aoe.
And mostly turns into a cybetronian flyer similar to the x wing

 

Vector did not exist until the Cybertron show, so he was not in G1.

And that fanart is of Primus/Cybertron, not Vector Prime. As they are not the same character.  

Anyway, the theory is good on what the V could mean.  

 

I thought I read somewhere they were one and the same. Meh, my mistake. Thanks anyway.