Well that's just too far-fetched to be honest.
It's also too far-fetched that Zack meets Aerith in the same way as Cloud did. But it happened that way.
There are many hints that the first CD will be play in Midgar. Nomura said that the story will change and that the compilation of FF7 won't fit anymore (it's silly that he thinks that it fits before), which indicates a massive rewrite of the story. They also said that they want to decide the game into episodes, where each episode will be a full game and has its own game play. This means they have to divide the game into separate pieces and have to find a way to tell each story without direct contact of the other stories.
Then there is a very practical reason. SE has to produce the remake with as low cost as possible, but they also want a breath-taking experience, so they can't come with a lifeless small city as in the original. What's clever to do is to keep the story in Midgar and working only on the huge city rather than working on a whole continent. Maybe that's why they hired Cyberconnect2 for the project in the first place, because they had experience with creating big lively cities. (Keep also in mind that SE struggled with creating FFXV open world.)
The last hint is that we have no footage of outside of Midgar. The iconic moment where Sephiroth goes walking through the burning Nibleheim is something I would expect to see, instead we see Sephiroth confronting Cloud in Midgar. Then there are additional bike scenes, which probably means that there is a lot more to be explored than in the original game.
Though, the only argument why I could be wrong is that we have mainly seen scenes from the very beginning of the game, but... well, call it a feeling that I right about that. If you look on some older threads where we discussed the refusing of SE to make a remake of FF7 I predicted that SE will make a remake of it in the middle or to the end of the PS4 lifetime, because they need this money. And I was right about that.
Get me right I hope I'm wrong and FF7-R will blow our minds away. But my concerns started when I saw, which people are responsible for it. Hideo Kojima would have been a welcome surprise to me and a cooperation with Monolith, even though it means that it would have been designed with the switch in mind. But at last I had a guarantee that they focus on a very good game play and story and not on shiny graphical blending mechanics to hide the next uninspired Final Fantasy meets Kingdom Hearts mix.
I think a good comparison is Lufia II to its DS remake. These are very different from each other, but both are great games. A downside of the remake for me was the very linear story, other than this it was pretty entertaining. But, while it is graphical very impressive for a DS game it still stands in the shadow of the original game.
This is what I expect for the FF7 remake, though this would be a disaster for SE because the remake needs to surpass the original.
EditJust found this
https://www.ign.com/articles/2019/06/11/final-fantasy-vii-remake-expands-on-the-story-of-midgar-e3-2019