There's been some talk in the last few months poping up here and there in interviews about raising the hero cap from 3 to 7. Here are some quotes about possible future changes comeing to GW1:
* We'll be visiting Cantha after Keiran+Gwen is resolved. September was mentioned, but he also said they're a bit behind.
* He talks about seeing the ramifications of releasing Palawa Joko.
* Sounds like some GvG changes are coming.
* Dervish skill changes are being worked on. Trying to make it more fun to play.
* One issue with 7 hero teams was pvp teams of 1 person and 7 heroes. Talks about 7 hero teams not hurting anyone, and how hard some WiK stuff was with henchmen. He's open to 7 hero teams, but says they're working on something new involving heroes.
* There are new items in the works.
* There will be new consumables.
* Like to make new festivals.
* Paragon is currently probably going to be the class focused on after Dervish.
* Not aware of any plans as to what GW1 is going to be called after GW2 comes out. ("Guild Wars" or "Guild Wars original", etc)
* [He would] love to add new stuff to festivals. Personal fan of Halloween.
And also a question from a WiK survey Anet put up:
How would you feel about having a party that you could fill with Heroes?
http://www.arena.net/blog/take-our-war-in-kryta-survey