Eerie
Fire and Blood
But why would they skip Kalm? Every area in remake part 1 is massively expanded, they didn't skip anything (unless you really wanted to see the inside of Johnny's house.)
Be careful, it's not "something that I want" but something that I could see the devs doing. As I said, either we have the flashback to work as a tutorial placeholder, ala bomb mission in chapter 1-2, either they'll want to streamline this and we'll have the flashback more spread out throughout the game, which could help with Tifa's reaction. Kalm in itself is not a location where "something happens" so it's an easy location to forget about. Normally we have the flashback and the vendors at this time in the OG, however we'll have no money at this point and starting with a breather is a bit odd.
And moreover, 2 sentences from the devs in different interviews have made me think that: "how did we arrive in Kalm?" and "there are big changes already" (or something alike), the latter being in a recent interview. In that interview, it was also mentioned that everything is expanded on, like in Midgar, which is why I'm considering Junon/arrival in Costa del Sol as the end of part 2, especially since there is a Jenova fight on the ship.
However, by the time we arrive in Junon, I do expect the flashback to have been told in full - there is this instance of true!Cloud asking SOLDIER!Cloud in his dream "where was Tifa?" which is a big hint and that I expect to see in a form or another - but it could be left somewhere else.
The Mythril Mines are definitely going to bee their own dungeon expanded in one chapter. Imagine the thrill of arriving there, and having that massive beast killed by Sephiroth... and you're following, wondering if he's still there (only to find the Turks).