When did the war begin? How many Primes came and went after the original Primes,the Fallen and Optimus? When did Megatron become The Fallen's disciple? How does the All Spark, Matrix, pillars...all relate to each other? Seems like Megatron had lots of plans going on. Scheme with Sentinal, plan with the Fallen and sun harvester, but before all of that concludes, he leaves Cybertron to chase after All Spark.