Samjeong Planning Co., Ltd

"The leader of Alector abducts a young boy named Marco after destroying a cruise liner. He mutates Marco into his new adult sub-leader of Alector, christening him Gel Sadra. The 5 Eagle Brothers are summoned to their secret base and transform, as Alector is attacking the ISO. Gel Sadra manages to escape the team's clutches. Though Cheol, the youngest member of the team departs and tries track Alector down. He winds up crashing into an island with a hidden pyramid. The 5 Eagle Brothers decide to investigate the island and it's pyramid." - Gatchaman Wiki write up. Produced by Samjung Planning, 5 Eagle Brothers is a compilation film based on redrawn episodes from Gatchaman 2.