Some more thoughts about the ending
First of all people on twitter pointed out that Zack's buster sword is really fucking rusty just compare it to Cloud's, so that's sus (...also no materia)
Secondly I really think that Aerith's line at the end were directly connected to Zack.
The dlc ending feels super weird. For some reason the devs decided to remake the actual ending of part one. Same sky, the sudden rain and Aerith sensing Zack, while she also seems to be kinda uneasy. Which is a very strange decision since it's a bit cheap to redo a ending you just did for your main game. So that probably means the devs are trying to highlight something here imo. I think it's the connection between people that seems to happen when water is involved. this is also something that happens pretty often through out the compilation.
We saw it in CC when Zack was about to die
We saw it in AC between Aerith and Cloud and between her and Tifa in the airship
We saw it in the ending of the remake between Aerith and Zack
AND between Barret and Marlene. When she is watering flowers, there is a special focus on a water drop after that it's like she hearing her dad's voice, just for the game to cut to Barret who is literally calling out to her.
If you look at the scene it seems like both these moments are happening at the same time. And I think the same goes for Zack and Aerith. It starts to rain and suddenly Aerith is feeling uneasy cut to a
very nervous Zack. So that would mean these scenes are simultaneously happening which seems to be a bit of a problem since it looks like when the team arrives at Kalm it's already getting dark while the Zack scene seems to happen wen it's still bright outside, but if you look at the sky when the team arrives at Kalm you realize it's literally the same color/brightness from before (the remake ending), but if you look back at the DLC ending, before the team hitchhikes it's super bright outside which means it couldn't have been evening when they started their journey, it just looked like that because of the rain and clouds. The same thing is happening again in the DLC ending, it looks like it's evening but actually it's probably more like noon.
Leaving Midgar
Some time later the same day
Again some time later
so it's probably just has been a couple of hours since they left Midgar