Like you, I thought “Wait I already saw a Gwendolyn trailer” when I noticed a second the latest Odin Sphere Leifthrasir video on Atlus Japan’s YouTube channel, but it turns out that this one is a much more gameplay-focused trailer. So here it is. You can see a lot of the new gameplay stuff in this video.
Odin Sphere Leifthrasir is the remake of Vanillaware-developed PS2 classic Odin Sphere and is bound for Vita, PS3, and PS4. It’ll come out in North America in 2016. I played the PS4 version at the Tokyo Game Show and found it quite good.