The Lost Light crew find themselves in Swerve's mind, within a holomatter replica of Earth constructed out of sitcom tropes. (2015)
some cloaked mystery villain guy shows up in the Japanese intro for Animated, and nowhere else. (2008)
a deluxe class Unicron toy is released in the Cybertron line, that turns into an alien crab tank thing. (2006)
the Chinese Transformers Online MMORPG creates like a hundred new Transformers characters that have never appeared anywhere else before or since. (2012)
a whole bunch of completed Transformers comics go unreleased due to Dreamwave's bankruptcy. (2004)
concept art for the combined form of the "Ani-bots", an Autobot combiner that would have debuted in the 1986 movie. They would have been released from a zoo to fight Devastator. the concept of an animal combiner eventually evolved to become the Predacons. (1985)
prototype of a G1 Unicron toy, that was ultimately cancelled due to cost concerns. (1986)
a prototype for a new toy of Armada Optimus Prime is unveiled by Takara at Wonderfest 2019. As of this writing, the figure has still not been released, for unknown reasons.
the Transformers fandom's first look at the then-upcoming Combiner Wars Devastator is obstructed by some random bald guy. (2015)
Ultra Magnus is forced to smile, ruining his reputation. (2012)
In Beast Wars, Terrorsaur dramatically declares "welcome to the dark side!" when Cheetor enters the Predacon base. (1996) Because TF fans take everything extremely literally, a prequel comic states that the Predacon base is literally named "Darksyde". (2006)
Starscream unleashes his secret weapon, Meowgatron. (2018)
Michael Bay's official M&M-sona. (2009)
Transformers vs G.I. Joe and Beast Wars Uprising, in the same year, both feature the Earth becoming a Transformer. Atlas in TF vs GIJoe, and Gaea in BWU. (2016)
a man paranoid about Transformers taking over Earth buys a gun that secretly contains a portion of Megatron's mind, which tells him to assassinate Bumblebee. (2010)
the Cyberverse cartoon throws in a shout-out to many prominent online TF fans by writing their names in Cybertronix. (2021)
Megatron sees how many deaths he's responsible for as each flower represents a life lost because of him. (2016)
Megatron removes his hemet to reveal he has "hair" underneath. (2007)
Primus uses Cybertron's moons to clobber Starscream. (2005)
Rodimus finally accepts the burdens and responsiblities of leadership...just in time for Optimus to come back to life one episode later. (1987)
Snow Cat yodels while skiing in space. Megatron is unamused. (2004)
Dion gets shot and killed, but unlike Orion Pax and Ariel, is never rebuilt, causing fans to endlessly speculate as to whether he was ever rebuilt into anyone. (1985)
Blackarachnia makes an innuendo. (1999)
Arcee makes an innuendo. (2006)
Derrick Wyatt designs Animated Hot Rod with a 'popped collar' look, based on Hot Rod's #1 fan, Protoman. (2008)