Coming - a Pro Ecclesia conference on Heaven, Hell, . . . and Purgatory?. The contributors have a blog with posts on the subject. Some of the posts are on universalism - actually against it, which is disappointing since I'm for universalism, but still, the posts are interesting and mention Hans Urs von Balthasar and Barth. The first blog post - Welcome to the blog - is at the bottom of the blog's page. There's also a link to a series of lectures from Cambridge University, The Stanton Lectures 2012-13, on the "end time".