Yes it's a 6 book arc.
Yes, there will be a fourth Ghostgirl book coming out next November.
If there is, then there will be an entirely new series of Seekers, since Erin Hunter (Tui Sutherland, in this case) only writes books in series of six. As of now, it depends on the success of the current series.
Yes. Survivors will be about dogs, though details are still unknown.
No. According to Gamespot.com, it will be release on Nintendo Wii.
OK, I looked up tons of interviews of Erin Hunter talking about the Seekers series, and she said something like, "Yes, there will be a 2nd series, and it will be called Return to the Wild." Which means that there will be a 7th, but it will be the 1st of the 2nd series.
Not currently--right now she is working on a dog series called Survivors, as well as Warriors (cats) and Seekers (bears)
Yes, there is! It is called Seekers: Great Bear Lake.
yes
Not as far as we know right now.
October 24 2011 its going to be the start of a new trilogy called the hunter. Its about elena and stefan in there college years .
Yes. It's called Tinkerbell and the winter woods or something. I don't know when it's coming out though
Yes, there are going to be events on the Fourth of July