So major that I actually waited for a few more updates to post this! Anyways, in this news round up, we have the first promo, Aka Ranger's cameo in Let's Go KAMEN RIDERS and the synopsis of probably, the greatest Super Sentai film ever made!
Someone at 2ch mentioned the reason why Aka Ranger's actor, Naoya Makoto was listed in the film, OOO - Den-O - All Riders: Let's Go KAMEN RIDERS it is because that one of the monsters in the said film went to the Super Sentai World.
Asides from that, the first promo of 199 Hero Great Battle has been released.
Also, the complete synopsis of the said film which was found on a movie pamphlet was released in the public! In front of the movie pamphlet was a coloring page for the kids who received it.
In order to protect Earth and the future of humanity, Goseiger and the previous 33 Super Sentai teams had lost all of their powers when fighting Zangyack during Legend War.
Several years have passed since then, and now, Kaizoku Sentai Gokaiger who came to Earth in order to find "the biggest treasure in the universe" are fighting against Zangyack once again. With the power of Ranger Keys, they were able to transform into multiple heroes and face the enemies. But then, the five warriors of Goseiger who had lost their powers appeared! And they were able to transform again by stealing away the Ranger Keys from Gokaiger!
Meanwhile, Zangyack was facing a mysterious dark force. The true identity of that mysterious force is the Black Cross Army's leader, Black Cross King who have returned from hell. With their own various reasons, Zangyack and Black Cross King are teaming up. The evil allied force uses their flagship Gigant Horse to assault Gokai Galleon and also revives previous villians one by one, driving Gokaiger and Goseiger into a corner. The enemies attacks are endless! At this rate, will Earth really be conquered by them?
That is for us to find out once Gokaiger - Goseiger - Super Sentai: 199 Hero Great Battle will be released in theatres this May 21st!
Source: DecaEnd of HJU (for the pamphlet image) text translated by xzomega of Rangerboard via alternate-zer0 of HJU via JEFusion (Link 2)