Well we had originally intended to do a 'half' version (0.35) for October last year. However, there was a lot more that we wanted to get in, and so we will be releasing a 'full' version (0.4) in the coming months (probably early spring). Originally we said the version after next (i.e. the version after 0.35, which would be 0.4) would contain WW1, though as the next version is taking up the "0.4" name the version with WW1 included will now be 0.5.
In the next version there's quite a bit that has changed. We've incorporated numerous mods by external contributors (many of which were not originally anticipated), created many new chains, altered existing chains, rebalanced many nations and reorganised a lot of the files and other background maintenance (i.e. stuff which doesn't affect gameplay, but just makes adding events for future versions simpler, not to mention making event chains easier to understand).
Once the final beta is up for testing (which should be in the next couple of weeks or so) I will post a thread with pictures of some of the changes in the next version. Don't hold me to it though... something could come up?