Sorry for my bad english in advance guys.
So they tell us the events of Episode Ardyn happens 30 years before the beggining of the game (M.E 756 Kingsglaive Movie, probably game too). So the year we can expect the Episode to begin around M.E. 726 (no excepional event in this year).
But around this time Regis was not a king, he only became king around M.E 729, and he travel the world with his friends around M.E. 725 (same year the war against Nif started again).
We can expect Ardyn to be release from his prison around M.E 723 ( the year Nif started making Magitek soldiers, but we can't know how many years Verstael lose trying to make actual functional Magitek Soldiers with the help of Ardyn, can't remember episode Prompto dates).
Like the tumblr post saided the Kingsglaive were created 15 years before the events of game.
But you see a lot of this dates don't match. We're gonna have another time skip inside the Episode? And this is where crazy theories start. Why Ardyn's waited at least 15 years to make a move against Insomnia (M.E 723 - M.E. 741)? Why King Regis doesn't know how the hell Ardyn is in Kingsglaive movie. Did they make a deal of some sort (so why attack Noctis as a kid, it was implied Marileth was unleashed because of the empire, why attack Tenabrae).
The next paragraphs is just a wild theory of mine xD. A man can hope at least.
I have a theory of my own. One thing i think is very confusing is whole Somnus thing in the trailer, not the character itself but the blur around him and the field of flowers around him, so i don't think is a flashback of anysorts, but a real encounter after the fight against him (we did see Tonitrus in the trailer, so a fight against Somnus can be expected) in somekind or another dimension thing or a ending with him after Noctis destroy Ardyn (we did see this ''time skip'' with episode Ignis, and the director for Ep Ardyn is the same).
So if the whole thing with Somnus happened after the ''True Death'' of Ardyn i really expect they can put the alternative ending inside Ep. Ardyn. I don't remember if there any hints of time travel in the game, or sending the consience of someone to the past (Ignis somehow have a foresight abilitie because of the power of ring, so I can hope Ardyn or even Somnus have some abilitie of this kind). Ardyn finnaly purged of the Starscourge sends him consience into the past to the point where he is free by Verstael. There is a glimpse of Somnus appearing btw in the trailer when Verstael wake him. Because he is weak for staying sealed for so long he needs to work with Nif. He goes to Insomnia, warns the Regis about the events that need to happen and one life still need to be sacrificed (Dawn Trailer btw xD, it is Ardyn speaking to Regis in the trailer, confirmed by the French and German version of the trailer if iam not wrong) and i think the life is no other than Regis. (we did see the image where everyone is fine, except old King Regis, btw i know he can died of old age by that point xD). Boom we get the alternative ending, everyone is fine, except Tabata u,u)
So they tell us the events of Episode Ardyn happens 30 years before the beggining of the game (M.E 756 Kingsglaive Movie, probably game too). So the year we can expect the Episode to begin around M.E. 726 (no excepional event in this year).
But around this time Regis was not a king, he only became king around M.E 729, and he travel the world with his friends around M.E. 725 (same year the war against Nif started again).
We can expect Ardyn to be release from his prison around M.E 723 ( the year Nif started making Magitek soldiers, but we can't know how many years Verstael lose trying to make actual functional Magitek Soldiers with the help of Ardyn, can't remember episode Prompto dates).
Like the tumblr post saided the Kingsglaive were created 15 years before the events of game.
But you see a lot of this dates don't match. We're gonna have another time skip inside the Episode? And this is where crazy theories start. Why Ardyn's waited at least 15 years to make a move against Insomnia (M.E 723 - M.E. 741)? Why King Regis doesn't know how the hell Ardyn is in Kingsglaive movie. Did they make a deal of some sort (so why attack Noctis as a kid, it was implied Marileth was unleashed because of the empire, why attack Tenabrae).
The next paragraphs is just a wild theory of mine xD. A man can hope at least.
I have a theory of my own. One thing i think is very confusing is whole Somnus thing in the trailer, not the character itself but the blur around him and the field of flowers around him, so i don't think is a flashback of anysorts, but a real encounter after the fight against him (we did see Tonitrus in the trailer, so a fight against Somnus can be expected) in somekind or another dimension thing or a ending with him after Noctis destroy Ardyn (we did see this ''time skip'' with episode Ignis, and the director for Ep Ardyn is the same).
So if the whole thing with Somnus happened after the ''True Death'' of Ardyn i really expect they can put the alternative ending inside Ep. Ardyn. I don't remember if there any hints of time travel in the game, or sending the consience of someone to the past (Ignis somehow have a foresight abilitie because of the power of ring, so I can hope Ardyn or even Somnus have some abilitie of this kind). Ardyn finnaly purged of the Starscourge sends him consience into the past to the point where he is free by Verstael. There is a glimpse of Somnus appearing btw in the trailer when Verstael wake him. Because he is weak for staying sealed for so long he needs to work with Nif. He goes to Insomnia, warns the Regis about the events that need to happen and one life still need to be sacrificed (Dawn Trailer btw xD, it is Ardyn speaking to Regis in the trailer, confirmed by the French and German version of the trailer if iam not wrong) and i think the life is no other than Regis. (we did see the image where everyone is fine, except old King Regis, btw i know he can died of old age by that point xD). Boom we get the alternative ending, everyone is fine, except Tabata u,u)