I don’t think it will spoil your experience to do them out of order. You’re getting so much information thrown at you all the time anyway - you’re not going to remember everything that gets said. I did the main story years ago on my first character. I haven’t done it for any of my newer characters, not even the one I now consider to be my main char. I did Elsweyr before Summerset for her, too. Do whatever content you’re most excited about doing; otherwise you may feel like you’re rushing through one to get to the other.

You're fine to do them out of order. The references to things from the other DLC might seem strange, but not to where it'll mess up the story. (It's kind of like when they make a book into a movie, and leave some details out. People who read the book might "get" it on a deeper level but those who didn't still follow the movie.)

Summerset and Elsweyr storylines have very little overlap since the main threats in the quests aren't related. From what I remember, only some side quests with Rigurt the Brash and Razum-dar in Elsweyr might have some overlap with Summerset

That's different from Morrowind-Summerset, since the Balmora storyline affected things in Summerset main quest for example

AVaelham wrote: »

There are three story arcs in ESO so far:

• The Planemeld (Main Story and Imperial City DLC)
• The Daedric Wars (Starts with Morrowind Expansion, continues with Clockwork City DLC and it is concluded with the Summerset Expansion)
• The Season of the Dragon (Wrathstone DLC, Elsweyr Expansion, Scalebreaker DLC and Dragonhold DLC)

ZOS deliberately made the timeline unclear so it is not certain if the Season of the Dragon is after the Planemeld or the Daedric Wars, but since there are no dark anchors in Northern Elsweyr, I guess it happens after the Planemeld.

Elsweyr is, at least so far, pretty contained.

It's 100% happens after the plainemeld, since you can talk about main quest events with Abnur in Riverhold, and even ask what did he do with the amulet (I've just started the main Elsweyr quest).

@Thundertalon
Thanks for the info. I'll check those side quests.