Fans may be wondering why the world needs a fifth installment in Michael Bay's live-action Transformers series. The massive box office haul for the fourth installment (particularly overseas) says that plenty of people at least wanted one, so Transformers: The Last Knight has been in production for several weeks now - promising a top-secret storyline and new characters.
Additionally, the upcoming Transformers film promises the return of old favorites, both human and robotic, including Josh Duhamel as the human special-forces soldier who appeared in the first three movies. Now, Duhamel himself has teased the return of another familiar "face" to the franchise.
Taking to Twitter, Duhamel posted an image of a a police cruiser tricked out with customized wheels, extra lights and spoiler, with accompanying text leaving no doubt that the image depicted the Decepticon Barricade in his vehicle form. The character originated in the first film in the series, notably being the first full-sized Decepticon seen (active) onscreen and participating in the first robot-versus-robot battle (against Bumblebee) in the series. He was destroyed and presumed killed during the events of Transformers: Dark of the Moon.
— Josh Duhamel (@joshduhamel) June 10, 2016
Barricade was the name of several different characters in the Transformers toy, cartoon, and comic-book lore prior to the police-cruiser version of the character that appeared in the live-action film; the original 1990 variation was a turquoise, pink, and yellow Formula One race car packaged as Commander of the Race Track Patrol Decepticon team alongside Motorhead, Groundhog, and Roller Force. The name was later shared by the leader of the Decepticon team that formed the gestalt combiner-robot Bruticus Maximus in the Transformers: Energon series.
Exactly what role Barricade will play in the new film is unknown, as the plot has been kept secret thus far. The prior film concluded with Optimus Prime heading into outer space for a confrontation with the Transformers' mysterious Creators, while secondary villain Galvatron (a reincarnation of Megatron) absconded to parts unknown along with his new army of "bootleg" Transformers created by nefarious human scientists after a battle that destroyed much of Hong Kong. Megatron has also been named among the characters set to return, but it's unclear whether this refers to Galvatron or the original version of the character, who was also (seemingly) killed in Transformers: Dark of The Moon.
Some have speculated that The Last Knight, which is set to be Michael Bay's final turn at the helm of the franchise, will set up the ongoing plot of the new Transformers Cinematic Universe and potentially also a secondary wave of interrelated films based on other Hasbro toy/game properties. Some have gone so far as to posit that the "Knight" of the title may somehow refer to the character of ROM The Spaceknight, who has a movie of his own currently in early development under the same regime.
Transformers: The Last Knight opens in U.S. theaters on June 23, 2017, followed by the Bumblebee spinoff on June 8, 2018, and Transformers 6 on June 28, 2019.
Source: Josh Duhamel