With all these rumors spreading around about what's going to be in the next update, it'd be nice if they added a "Future Changelog" for the next non-bug fix update that 4J Studios is absolutely positive will be in the next update.
From what I've seen and heard it seems likely that the next update will be the same as the PC's 'Scary Update' which will bring in the Wither, Bats, Witches mainly but obviously other items and changes as well.
For example:
Changelog:
I could be wrong but my money would be on that.