What if Raijin, Ryuujin, and Fuujin from "Kishin Corps" were in Super Robot Wars? An ability showcase.
Based a Seiun Award winning novel series by Masaki Yamada, Kishin Corps is a 7 episode alternate history mecha OVA set through the Sino-Japanese War, including the European theatre of World War II.
In this series, an alien invasion occurs alongside the development of the Second World War. In order to combat the invasion, a multinational group of scientists develop giant robots using alien technology, also establishing a non-aligned military force to assist them. Despite the Kishin Corps not being intended to serve the interests of any particular nation, they are forced to join the war as their advanced technology makes them a target of the expansionistic dictatorships of the Axis, particularly the Empire of Japan's Kwantung Army as well as Nazi Germany.
For clarity, the subtitles here are not mine.
「機神兵団」の雷神と竜神と風神がスーパーロボット大戦シリーズに参戦したられば。全て武器と特殊能力。