Aside from the new trailer, joining the show's cast are:
The team behind the previous three Ultra Galaxy Fight series namely, director Koichi Sakamoto (Ultraman Geed, Kamen Rider Fourze) and writer Junichiro Ashiki (Ultra Zero Fight) returns to work on this spin-off series as well as its sequel, Ultraman Regulos: First Mission. The series is confirmed to have a total of 6 episodes, and is set to premiere on the Ultraman YouTube channel on May 23rd with episodes 2 and 3 airing on May 27th and June 3rd respectively. It is then compiled into a single volume, which will debut on June 3rd, exclusively on Ultraman Connection.
Finally, the sequel to Ultra Galaxy Fight: The Destined Crossroad, Ultraman Regulos: First Mission will have two parts, with Volume 1 set to premiere on July 4th and Volume 2 on July 9th at the official Ultraman YouTube channel. The full version will is also set to debut on July 9th, exclusively on Ultraman Connection.