Nomura also just revealed in Famitsu that they tried to hide Jack Garland's connection to Garland/Chaos at first, but Team Ninja told them all that the Western Audiences guessed Jack became Garland.
So, they clearly were trying to hide the link and connectedness of the plot to FF and now... They're simply not. And technically, it's not a "continuation" of FF1, because it's
before FF1. So yeah, it doesn't
"continue from" FF1 at all. Nomura even says the previous PR strategy was asking "Who is Jack?" and is now "How did Jack become Chaos?" The connection isn't in question or obfuscated anymore.