He could pass the rank and the Matrix onto the person he deems worthy of being the next Prime. Why Jack was previously considered an "Honorary Prime" back at the start of season 2.Manterax Prime wrote:Anyhow, how is there supposed to be a "new" Prime if Optimus is the last of them.
Don't forget, Optimus wasn't a Prime back when he was Orion Pax. He succeeded Sentinel Zeta Prime just like the next Prime (when and if there is one) will succeed him, whoever that may be.