The first Toshinden was the reason I originally got a Sony Playstation. The music and the character voices get stuck in my head to this day. The gameplay was @$$, but it was a lot of fun, and had some potential for an early 3d fighting game. I played Eiji, Ellis, and Sophia.
The OVA was embarrassingly funny to me. seeing Duke show up on a horse at the end for almost no reason, using a terrible accent to rally the troops was too good.
I heard somewhere that fighting force was originally supposed to be a new streets of rage for the saturn.
I would also love another Ehrgeiz. I loved that game on Playstation.
I think a Ehrgeiz sequel would be awesome. It would have 2 outfits for each character, of course for the FFVII characters the default outfits would be their original, and alternate would be the Advent Children outfits.
As for Fighting Force being a sequel, they were going to do a SoR4, but at the time it was so laughably bad that it got canned, although I think Sega could actually do it now, I mean their game Yakuza is probably one of the best 3d beat em ups for the ps2, if they had the team that did Yakuza, then there's no doubt in my mind they could make a kick@ss sequel to SoR3. As for the old SoR 4, here's what it looked like.
[youtube=425,350]ouKkNmaa8Ng[/youtube]
Cinco de Mayo