Proving that no matter how bad an idea, if someone in a suit thinks a character is absolutely necessary for a franchise, even killing them off isn't good enough to prevent them from insisting they be used. Thus, we got Alien Resurrection, where bringing the Xenomorph back from extinction honestly took a backseat to getting Mrs. Weaver to reprise her role as Ripley yet again. While this one didn't have quite the production (blog post) hell to worry about that the third film did, that's not (blog) to say it went much (blog) smoother...
Source: Alien Resurrection Movie Review - Decker Shado