Zyuranger, the Super Sentai season used as the basis for the first iteration of Mighty Morphin Power Rangers, was the first Super Sentai DVD set released by Shout! Factory. Since then, Shout! has also released a Gosei Sentai Dairanger set and announced a Ninja Sentai Kakuranger set. Zyuranger and Dairanger are currently on sale here.
On January 23rd, Shout! hosted a marathon of Zyuranger’s first seven episodes to give viewers a preview before adding the entire show to their Shout! Factory TV service. Zyuranger is the fourth tokusatsu show on the service, after Ultra Q, Ultraman, and Ultra Seven.
Source: Shout! Factory TV