This is all unconfirmed chatter among japanese viewers right now. We'll know more official stuff soon. Right now I'm not even sure what was shown on screen... I read something vague about Guts fighting Grunberd, but I don't trust the source further than I can spit.
But ... early reports on the first commercial that aired today on NTV were that it is an animated project for television (so, not OVA and not 3D/CG), being produced by STUDIO4℃, who generally does OVA type productions, but have also done some TV (see their full works here: http://en.wikipedia.org/wiki/Studio_4%C2%B0C). In the west theyre known for doing things like the Animatrix shorts, and Halo Legends. They also recently did an OVA for Detroit Metal City, another Young Animal series.
*Unconfirmed info.
But ... early reports on the first commercial that aired today on NTV were that it is an animated project for television (so, not OVA and not 3D/CG), being produced by STUDIO4℃, who generally does OVA type productions, but have also done some TV (see their full works here: http://en.wikipedia.org/wiki/Studio_4%C2%B0C). In the west theyre known for doing things like the Animatrix shorts, and Halo Legends. They also recently did an OVA for Detroit Metal City, another Young Animal series.
*Unconfirmed info.