It looks like the Paranormal Activity 2 sequel that is to be strangely directed by either Brian De Palma, Brad Anderson or Greg McLean, will see the original cast come back in some capacity.
Micah Sloat from the first film has been spewing to MTV and kept using the term "we", indicating that his ill-fated boyfriend could be making an appearance: "All I can tell you is that I'm very excited for the project," Sloat said. "It's really cool. It's gonna be really interesting, and it's not going to suck, which most horror sequels you would imagine would." He then added, "We have money now, but we're staying true to the heart of the movie, to the spirit of it and to the vision."
Could just be wishful thinking on Sloat's part, and there was no mention on if Katie Featherston would be coming back. Flashbacks maybe? Or folks watching some "unseen" footage from before? Either way a sequel is intriguing.