Post GW:EN expansions?

With GW:EN almost coming out, it got me wondering: will Anet bring out new expansions before GW2, and if so will they be GW:EN like, or more Nightfall/Factions like?

No, they will not.

Anet said that they could imagine to publish another Add-On. But there are no real information yet.
I think they will because they have to finance their servers

It is possible they will make another expansion, it will depend on player reaction to this one and how many copies of this they will sell. You got to remember not everyone will buy and expansion, and not everyone who bought the first expansion will buy the second. Then how close to release of GW2 would the second expansion be also, if it is another 6-9 month break after GWEN comes out I think it would be feasible as then it would be another 6-9 months before GW2 as it is expected to come out sometime in 2009.

My thoughts are this, I think if anything what they'll do is maybe give us 1 or 2 "Sorrow Furnace" type updates eventually where they'll "introduce" new dungeons for further questing wouldn't be to hard just oh we had an earthquake or avalanche that uncovered a new dungeon. At least I hope that's what they'll do, it would be pretty easy to do and they could add a lot of stuff in that way as well. But as far as a Factions/Nightfall type add stand alone I don't think they'll be doing that.