Are the Fallen, Optimus Prime, Megatron, and Sentinal Prime brothers? in the first one optimus says that megatron is his brother. in the revenge of the fallen optimus says to the fallen "they were your brothers too". and sentinal has the last name prime. maybe thats why megatron was able to kill optimus in the second one. i'm a bit confused about the "descendants" aspects of the transformers movies. also, this pertains to dotm, if the decepticons were winning the war and in control, was it really that important for megatron to leave? megatron needed the cube to find the matrix of leadership for the fallen so the fallen could become more powerful, but if the decepticons were already in control, it seems kind of pointless. unless i'm missing something lol.