This is a theory submitted on 4/11 regarding one of the unknown Divine Knights. Please follow the cut for more details!

Not so long ago Falcom released a 1st April mocking trailer for sen no kiseki 4 which was featuring mainly arts and footage from their previous works. This “trailer” was broadcasted in Japan locally, so the quality of the first videos with it made it hard to distinguish anything but not so long ago someone uploaded the HD version on YouTube.

I won’t talk about the whole trailer but about the small part of it, which potentially showcases us some gameplay of the Sen no Kiseki 4 as well as very rapid collection of arts, which mostly referred to the previous arcs and games. After replaying this short exert with the speed of 0.25 I found some rather interesting arts one of which no doubt represents the last Divine Knight which is definitely awaits for its debut in September. It is also to some extent matches the shadowed Divine Knights on the Deus-Excellion visual from the Sen no Kiseki 2, as they both have some sort of tubes attached to the back. Given that Divine Knights tend to resemble their Awakeners with the color gamma I would go as far as guess that right now there are two potential candidates, obviously Golden Rakshasa or the new form of Ash as they definitely sticked with the brighter coat judging by the latest visuals of the Sen no Kiseki 4 characters. Lastly of course the actual image which I managed to grasp by sodomizing the quality even more.

P.S. If someone is really interested I suggest watching the whole trailer, specifically you can start from 1:05. As a testimony for this not being another “joke” there are also a couple of short videos showing us Musse fighting alongside Vita and Aurelia or Thomas running around the dungeon as a playable character.

Additional Editor’s Note: omgfloofy

I’m adding to a comment on this, to make some notes regarding the April 1st video. As the submitter states that the video is real due to the footage of Vita, Aurelia, and Thomas running around, there’s a bit more to prove otherwise, and that these were done via Nihonurafalcom’s amazing video editing skills.

Despite his amazing skills, though, the creator of the video is not with Falcom, and has since admitted that this video is not real. You can find his tweet about it here. He even talks about things he messed up on in the video here, here, and here.