I know he is Cybertron and he shut himself down so Unicron wouldn't find him, but my question is, is he a Prime and did he created the Matrix? Thanks
I don't think so, from what I know it's just given to a prime to symbolize he's a prime but is also what keeps the autobots together
Its implied that the matrix is part of Primus.That he made , or it was made, with part of Primus's spark.
He created the Prime. He's the Prime's Mommy or Daddy depending how you see things, Unicron would then be the estranged ex that stalks them. .
I'd rather say Unicron is the "King Claudius" or the "Scar" of this story: The evil brother who goes on a roaring rampage of revenge to replace/destroy his brother and his children.