The password is "nachtending".
For comparison, here's the original ending:
And here's the alternate ending that I used footage from (sorry about the poor video quality, but I didn't feel like uploading it when someone else already has):
First up, there's some subtle changes when Lena checks on Tom. When I watched the original movie with friends, they all thought that Lena was thinking about turning him into a vampire, and that seems to be a common reaction from what I've read online. But if you closely watch the scene, and pay attention to Lena's facial expressions in particular, I think it's clear that that isn't what is supposed to be happening. I think what is supposed to be happening is that Lena gets briefly overcome by hunger and moves to bite and kill Tom, but snaps out of it at the last second.
A big part of why people interpret the scene that way is undoubtedly the original movie's unclear presentation of how turning someone into a vampire works. Hopefully, the stuff I did with Lena's eyes in the club scene will make it clear to the viewer that turning Tom into a vampire isn't actually possible, since Lena never saw flashbulb eyes from him despite plenty of eye contact throughout the movie. But I wanted to wanted to push things a little more, so I changed the music to make it more ominous, and added a zoom in on Tom's bloody wound as a callback to the time when Lena got hungry on their date. This is another thing to add to the pile of "I can't be sure about this until I show the edit to someone who hasn't seen the movie before."
Then there are the major changes. I could list a whole bunch of things about the original ending that don't make sense or just don't work*, but the core problem is that it fails to coherently resolve or even further the story. Tom and Lena almost literally vanish into thin air, and all we get is a vague suggestion that they escaped and ran away together. Except that the sun is up, she's a vampire, and he's clearly too injured to walk, so by everything the story has established, they should not be able to leave the building. To quote a semi-famous Youtube reviewer (
http://www.youtube.com/channel/UCI3GAJaOTL1BoipG41OmfyA), we're given almost no information, and what little information is there makes no sense. It pretty much turns the entire movie into a shaggy dog story.
I much preferred Alternate Ending 1, seen above, from the first time I saw it, but it still had some issues. I didn't like how it just leaves Tom sitting around an abandoned building with a gunshot wound that might or might not be fatal. I don't like leaving loose ends like that, and I also want Lena fighting off her hunger to actually mean something. If Tom's going to die anyway, then she might as well drain him, since it would be faster and she has no idea where her next meal is going to come from.
So I decided to keep the part of the original ending where the cops show up, but have them find Tom instead (I had to rotoscope Lena out of some footage to get an appropriate reaction shot). Tom lives, but he's going to have to answer some very awkward questions from his old friends at the police department, and might face legal consequences. I don't know enough about German law or police procedure to speculate further.
But even those bits of footage from the original ending have problems that I want to fix. The cut to the cops outside was really badly done, as you can see, so I added an establishing shot. The only problem was that the time of day didn't match that of the shot from inside the van, so I replaced the sky and changed the levels of the latter.
To explain how the cops show up in the first place, I'm going to add some approaching police siren sounds to the earlier scene where Lena hotwires a car and escapes from the police station. Presumably, the station called for backup, someone saw Lena driving away, and they followed her. Again, hopefully it will work. At the very least, it should be better than the original's no explanation whatsoever.
Another thing that bothered me about the original ending is how small the police response is. Someone just invaded a police station and massacred at least 17 people (I counted), but the response team seems to only consist of 3 SWAT guys and a handful of plainclothes detectives. So I added some background noises of radio chatter, footsteps, and general activity to make it seem like there's a bunch more stuff going on offscreen. That's really all I can do with the footage I have.
Finally, there's the whole question of how Lena escaped from the building during the day. I thought it was really important to explain this, so I heavily altered an establishing shot from earlier in the movie to create that brief pan to an open manhole that's
just barely in the shade. Also, I thought the audio in the subway tunnel scene was a bit lacking, so I added some ambient sounds.
Obviously, the credits are placeholders, and there's still some work to do with the vfx before the final release.
* A few examples: Why wasn't a manhunt called the instant that they realized that Tom and Lena had escaped from their cells? Why do they call in forensics before they've finished searching the building? And my personal favorite: why are there three shell casings on the ground when Louise only fired the gun twice?