Probably the Shogun Ranger which we got the action figure for so early. The figure *does* have the Shogun Buckle, so it only makes sense at this point.
Considering that multiple BoA reps have confirmed that it will appear in the show and there's a photo of the actual suit on the box, I'd say that's pretty likely.
Probably because they can afford to do a little more with their original ones, whereas the Japanese ones they have to dumb down because they're very complicated and expensive, meaning American consumers won't buy them. American parents can be very frugal when it comes to certain items they'll get for their kids. Notice that the Mega Blade has no lights and no actual mechanisms. It's actually a very simple design, but what makes up for it is the playability in its simple design and the sheer awesome size of the toy. The Shogun Buckle looks to be no different, and since it's a smaller item with probably less sounds, they could afford to put lights in it.
DX Bullzooka - Exactly what it sounds like, will combine with the Mega Blade to form the "Shogun Spear".
ScropionZord with Decker - No idea...
Gigazord Giftset - Comes with Samurai Megazord, Claw, Bull, Beetle, Swordfish, Octo and Tiger Zords. They will be "Different" from their individual releases somehow.
DX Bullzooka - Exactly what it sounds like, will combine with the Mega Blade to form the "Shogun Spear".
ScropionZord with Decker - No idea...
Gigazord Giftset - Comes with Samurai Megazord, Claw, Bull, Beetle, Swordfish, Octo and Tiger Zords. They will be "Different" from their individual releases somehow.