Pretty sure I saw the Chocobo Racing demonstration pop up a DF queue when they showed it last week at that Nico Nico event. It makes sense since it needs 7 other players but I hope there are still some races against the CPU, so that at least you can play one of its modes meanwhile while waiting for another queue including a race queue, or else it'll end up having a similar situation to Frontlines, i.e. content that's actually fun gated behind pretty long queues.