This tent and outdoors set is just one of the items coming out from American Girl later this week (Wednesday, I believe) as part of their summer release.  American Girl posted this photo on their Facebook page.

I have also heard from a reliable source that they are coming out with many new outfits, new pet sets including a dalmatian (way cool), and My AG #61 will be released. No word on anything new for Isabelle, but I do hope they give her a few new items.