The Children of Destiny
Takuma and Baku become Getter Arc pilots by order of Hayate. Meanwhile, a space-time gate opens above the Saotome Laboratory and the enemy attacks en masse.
Aired 11/07/2021EP 2 - The Children of Destiny

Getter Robo Arc
The world is on the brink of apocalypse following an onslaught of invaders. To fight the attacking hoard, one of the original Getter Robo pilots, Hayato Jin, has finished Getter Arc, a new fighting unit based on the final work and ultimate masterpiece of Professor Saotome. Now the son of Ryouma – one of Hayato's copilots on the first-generation Getter – Takuma, the half-human half-Saurian Kamui, and Baku, younger brother of the extraordinary ESPer Tahir, step aboard the Getter Arc to combat the ruthless incursion and restore hope to their ravaged world!
(Source: Sentai Filmworks)