According to Dark Horizons, The Beat has a lengthy interview with Bruce Campbell where he talks a bit about potential sequels to The Evil Dead and Bubba Ho-Tep. Here's an excerpt:

On the The Evil Dead remake:

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"We're going to do the remake and none of us feel bad about it because it's our own remake. We're not getting some 1970's TV show out of Aaron Spelling's file draw and making a movie. This is our own movie. So we're gonna update it for a new generation with new effects and tell a new story with a new cast. We'll be pulling the strings from behind. And hopefully they'll like it. I don't know when it will come about. It'll take a while to find a director and to write it and get it all set but it's gonna be made."

On the The Evil Dead sequel:

"Everybody wants to make it. I do, Sam does, Rob Tapert does, so that's not an issue. The only issue is that this guy happens to have stumbled into a phenomenon. So until that dies down he won't have time. And really... there's no more mystery. That's it. There's nothing beyond that. It really is that simple. To tell the guy who made Spider-Man to stop so he can make Evil Dead 4... it doesn't compute."

On the Bubba Ho-Tep sequel:

"It's being actively pursued by two companies. That will probably happen. Don't know when. There will be a bit of prequel and bit of a sequel at the same time. There may be some parallel story elements."