In the year 2018 where aliens are still unknown, Ken Kurenai is a boxer who participates in underground matches until a scrawny man who turned out to be a Killer Robot has nearly beaten him to death. Ken was saved by the Kasuga siblings from his historical death, found his missing older brother Kenichiro, and learned of the Bad Future in one eventful night. Their two families (one with a Powered Armor, the other a Humongous Mecha) have to pool their talents and work together to ensure that history wouldn't repeat itself.
To some Tokusatsu fans, those names should be familiar. BraveStorm is a 2017 Japanese Crossover film of Super Robot Red Baron and Silver Kamen but remade with the sheen of The New '10s.
This film provides examples of:
- Alien Invasion: The Killgis began sending out Black Baron in 2021. Because of the Kasugas' interference in the past, this began in 2018 in the Alternate Timeline.
- Alliterative Name: The Kurenai (Ken, Kenichiro) brothers and male Kasugas (Koichi, Koji, Kozo) all have first and last names beginning with K.
- Alternate Timeline: The younger three Kasuga siblings going back in time creates another timeline, which unfortunately won't help the older two siblings they left behind.
- Bio-Augmentation: The Kasugas' respiratory systems were modified by their grandfather to enable them to survive in the polluted Earth.
- Daddy Had a Good Reason for Abandoning You: Ken learned that Kenichiro left to cooperate with the Kasugas and avoid attracting the Killgis' attention with his expertise in robotics to keep his family safe.
- Everyone Is Related: Also Related in the Adaptation, the Kasuga siblings are Kenichiro's grandchildren and Ken's grandnephews and grandnieces.
- Evil Counterpart: Inverted as the Red Baron is based on the Black Barons that Killgis uses to pollute the earth, but because of Time Travel shenanigans, it's the Killgis in 2018 who has to base off from the complete blueprint from the future to expedite the designing of the Black Baron.
- Hostile Terraforming: The Black Barons release gases that make Earth's atmosphere more suitable for the Killgis but deadly to Earthlings.
- Human Disguise: The Mecha-Mooks and Chigrises the Killgis created appear human until they exhibit inhuman abilities.
- Humans Are Bastards: Discussed by the lone Killgis in 2018, who wouldn't have targeted a peaceful and harmonious planet, but humans have their own destructive internal problems and conflicts ruining the Earth anyway so the Killgis might as well use it for themselves rather than let it go to waste.
- Insectoid Aliens: Kozo compared the Killgis to aphids and bees.
- Mid-Season Upgrade: Koji's initial Silver Kamen suit, already an improvement from the series, is further upgraded to the sleek armor in the poster.
- Mistaken for Aliens: One of the Mecha-Mooks thought that Koji is from a rival alien group because of his suit's technology.
- Monumental Damage: The movie poster shows a ruined National Diet Building
. In the movie itself, the Black Baron stops in front of it and releases the pollutant gas, but it never tilts like in the poster. - Mythology Gag:
- The name Killgis came from Silver Kamen's Monster of the Week with the name of Kyrargystan.
- Ken being a boxer is closer to the anime's Ken who is trained in Muay Thai and uses his Red Baron for Metal Fights instead of being a ninja scientist. However, this film's Red Baron is still created by Kenichiro instead of Shouko.
- Powered Armor: The Silver Kamen suit, of course, but unlike the 70s series, it's worn manually without a Transformation Sequence.
- The Promise: Kenichiro promised to be a giant robot creator so that Ken can pilot his creation, causing the former to single-mindedly insist to have the Red Baron be biometrically locked to his brother. When Haruka dredged up Ken's memories with her psychic powers, he's exasperated that his brother is taking a silly childhood promise too seriously.
- Psychic Powers: Haruka Kasuga is shown to be able to share and view memories. Her teleportation is also attributed to these psychic powers.
- Reforged into a Minion: The person piloting the first Black Baron in 2018 is a seemingly Brainwashed and Crazy Kenichiro. However, it turns out to be the lone Killgis in disguise when Kozo scanned him and Haruka found the real Kenichiro in an islet in the Bonin Islands.
- Sequel Hook: The film ends with a scene seconds after Koichi and Hitomi sent their siblings to the past. A cowboy then barged into their hideout and warned them about the "Shiranui" while an obscured red-and-silver giant (not that one) fights, implying that Iron King will be in the sequel.
- Stat-O-Vision: Kozo Kasuga has goggles for scanning whether someone is human or not.
- Time Travel for Fun and Profit: Not so much for fun, but they play the stock market and bet on horse races to fund the construction of Red Baron.
