The next build will come on March 3rd and the one after that on May 3rd.

March's build will still be in Logtown but a new event will be released and it will have story attached to it (it will be bigger than the last one)

May's build on the other hand will open up a bigger area. I think it will be quite big and I'll make it so that the saves you make in May will work in July's and September's builds too. I will just open new events and such but I won't touch the database so it should all work.