Nikita is correct. The "opening" trailer for FFXIV: A Realm Reborn is called "End of an Era" - it was the transitional trailer for FFXIV 1.0 → FFXIV 2.0. All the events of FFXIV 1.0 still happened, and those of us who are Legacy Players have shared the journey with the hyur that's shown as the "main character" in all the trailers for FFXIV.
To give you a little backstory about what's going on in "End of an Era": the Legacy Adventurers are assembled at Carteneau Flats, battling with the Garleans of the VIIth Legion for control of the area, which was calculated to be Dalamud's (the large, red 'meteor') impact zone. We still didn't know what exactly Dalamud was or what it did, just that we had tried in vain to stop it from falling, and that the VIIth legion had fortified their position at this impact zone, so in a last ditch effort to stop them we threw everything we had at breaking their position, hoping that it would offer something of a hint as to a way to stop Dalamud. Turns out that Dalamud was an ancient Allagan construct meant to imprison Bahamut, and Bahamut finally broke free of his prison in the trailer. Louisoix (the one you call "mage-guy") tried to use the power of the Twelve to stop Bahamut and send him back into the heavens, buthe didn't stack enough 1.0 magic accuracyBahamut was too powerful and the spell failed. In a last-ditch effort to save the realm, he called upon the power of Althyk the Keeper (One of the Twelve, specifically the one who is considered the god of time) to send the Primal-slaying* adventurer and his party forward 5 years into the future.
We're dropped into the future as if no time had passed from our perspective, a bit confused about what happened. During the trailer, the Black Mage calls the party over to see what Eorzea's new landscape looks like, and afternot being able to decide what emotion he wants to conveyseeing the landscape, the Adventurers call for their Chocobos, who we had obtained as companions during the 1.0 storyline. I suppose it's a bit strange that the Chocobos were so nearby when they heard the call of their adventurer companions, but that makes for a better trailer than a whistle and then 20 minutes of waiting while a Chocobo frantically runs from across the realm.
*Louisoix was the one who was the original questgiver in 1.0 for the Primal Fights we had: Ifrit, Garuda, and King Moggle Mog XII. He had many interactions with the adventurer and his party before, during the times he requested that the adventurer help quell the primal threat. In addition, he was involved with our efforts to stop Dalamud from falling. Point being, that's the reason he sent only "us" (meaning the 'main character' of the FFXIV Story: your character, who is represented by the hyur in the trailers) and our adventuring party into the future.