The Transformers: Hearts of Steel staunch ally of Muldoon after the Decepticons betray him. Only four Autobots were mentioned by name in the series: Bumblebee, Ironhide (in the TPB when he gives his name it was changed to Sideswipe) and Optimus Prime although he did not appear, though others are recognizable as G1 Generation 1 characters, introduced as toys in 1984. The opposite is true for the Decepticons, with many being named. Others are left unnamed but are recognizable such as Ravage. In addition to their original alternate modes as fantasy beasts, the Transformers later adopt alternate modes appropriate to the era in which they
Transformers: Power of the Primes Shockwave and Chaos by Thunderwing, Optimus Primal and an Unknown Evil (). The winners of the first round were Ultra Magnus, Star Saber and Optimus Primal, advancing into the second round alongside the Unknown Evil as a wildcard. The poll about a month later on February 18 with Optimus Primal being chosen to become the next Prime. On January 9, 2018, it was announced that Mark Hamill, who had previously voiced Megatronus in "Transformers: Titans Return", would resume his role for "Transformers: Power of the Primes". It was also confirmed that Ron Perlman would voice Optimus Primal, after the character