Okay, after a bit of investigation I can see that the new forum is needed as soon as possible. The current forum version does not support some of the updated technologies on the server it is hosted on and so some functionalities do not work properly (such as activation e-mails and captcha). The forum is very much out-of-date and needs an upgrade as well.
So I have decided to speed this up by leaving out many new parts and features of the new forum to release it as soon as possible. Once the new forum is released, I will continue on development and adding these new parts and features at later dates once they are finished. The version list on the first post has been updated - important and easy-to-do parts are now bold, I have to re-structure the version plan soon but for now this will do.