If they are really targeting the month of October then I do think that they should've been done already with their talks as it's we are now in July, so less time to prepare if indeed the fight will happen somewhere in October.
Both parties know the status of the ongoing negotiations therefore they might be preparing now even before the official announcement.
It's not that everything will just begin to prepare after they announced the official status of the fight. Preparations are surely in progress now as we speak and they didn't just announce it. Don't know what other things are left to be fixed but let's trust the process.
Even if they will announce it in August and the fight is supposedly in October, it's just fine and no worries about the preparation time.