The Transformers: Evolutions is the title of what was intended to be several comic book miniseries published by IDW Publishing, following the same idea of DC Comics' Elseworlds series. Each series will create a new continuity in a different time era during which the Transformers will exist. In other words, the Transformers can exist at places and at points in time that would not be possible in the current 'IDW-verse'. As of 2007, only one series has been produced: "Hearts of Steel", which is set in the United States during the Industrial Revolution
In the series, John Henry is a large bald man who drives spikes into the ground while laying track for the railroad. His hammering wakes up the Autobot Bumblebee who along with the rest of his squad lay deactivated deep within tunnels below the earth. Bumblebee is almost caught by John Henry until Bumblebee changes into an automated spike-driving machine. Here he is portrayed as being fearful of being replaced by modern machinery. Others featured include famous authors Mark Twain and Jules Verne, who view Muldoon's submarine. Twain later becomes a 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.
The story begins with the Autobots and Decepticons waging war on Earth around the time of a previous ice age. No explanation is given how they arrived on Earth, but their alternate modes are metallic fantasy beasts. The freezing temperatures and lack of energy forces both sides to take shelter and lie dormant for eons. The Autobots retreat to a cave while the Decepticons are later seen underwater.
At some point during the Industrial Revolution, noise outside their cave awakens the Autobot Bumblebee. He ventures outside the cave to discover the planet's new dominant species — man, and that they have developed steam powered technology and the capacity to build railroads. He observes some men, featuring the famous John Henry enjoying the labor of driving spikes into the ground for a new railroad. Bumblebee changes his alternate form to be a steam-powered spike driver and helps the humans who are unaware of his true robotic nature.
Meanwhile, the Decepticons awaken and start plans to take over Earth. Starscream is acting commander while Megatron is still powered down, predictably planning to destroy him while he is inactive and defenceless. When Shockwave approaches failed inventor Tobias Muldoon to assist them with the technology of the age, the Decepticons begin their plans in earnest. The Insecticons, who transform into a combined battle train, rob a bank train to help fund the building of their base. John Henry finds out about the Decepticon train robbery and informs Bumblebee, who then tells his fellow Autobots.
Muldoon, meanwhile has realized Starscream's true intentions. Gathering support from the author Mark Twain after Ravage tries and fails to kill him, Muldoon and his friends aim to stop the Decepticons from reaching New York and capturing an experimental electrical generator, which Starscream plans to use to destroy Megatron. Linking up with Henry and the Autobots, the heroes survive an attack from Scourge (reconfigured as a Zeppelin) and manage to divert the Decepticon train convoy into a chasm. The Autobots return to hibernation as the humans speculate on their fate.
In addition to their original alternate modes as fantasy beasts, the Transformers later adopt alternate modes appropriate to the era in which they awaken. As mentioned, Bumblebee becomes an automated spike-driver and the other awakened Autobots become locomotives or train cars. The Decepticons are a bit more varied, although many of them also transform into train cars. Shockwave becomes an ironclad warship. Starscream and his Seekers transform into Wright brothers-esque propeller driven aircraft. The Insecticons combine into a ramming battle train. Scourge has a huge inflatable attachment that allows him to become a zeppelin. Ravage's alternate mode appears to be an engine. One of the covers also show Squawkbox with the in robot mode combining a mechanical eagle and gorilla, though they likely don't become cassettes.
Toy & Packaging, by 3rd party manufacturer, MASTERMIND CREATIONS
Bot mode and gimmicks
Base / Cannon Mode