What are some ideas that you have? And what will be the primary topics here?
Reddit AskScience is a popular-science site: its goal is the "promotion of scientific literacy". If you look at the questions there, they are higher-level questions that would make sense to a layman.
In contrast, biology.stackexchange.com is a site by experts and for experts. The StackExchange engine can better accomodate the long tail of questions that are on a narrow topic.