Thanks

I figured there'd be something in the map. Now I've seen it, I can't believe I missed it, haha!
I'm afraid I ran into a strange glitch but I think I know why it happened. In the stage after beating Zangief I teleported over the wall with Raiden and killed the grenade thrower. The fight itself felt a bit glitchy and I got the impression that maybe I wasn't supposed to be able to teleport to him.
I beat the two new goons that showed up afterwards, but then it played out a cutscene as if they had just appeared (even though I killed them already). Then when I tried to walk forward, I fell through the floor. There was no hole there but it was behaving as if there was and I couldn't continue

There was one narrow strip of road I could walk on at the very bottom but the screen wouldn't scroll. So I had to close the game.
I tried attatching the script log in case it would help but the file size is too big