Are there direct translations of the full Japanese text from the extended and/or final versions of the trailer? When Y'shtola says "until our friend returns", I'm wondering if the original text wasn't something more like "joins us", because if time travel isn't involved, the scene in the burning village is probably happening right about now, before we get called.

If that isn't the case, then we probably take a short visit to the First in 4.56, and meet up briefly with Y'shtola and Urianger.