I wonder if another possible explanation for the "may" could be that they feel the current share price already caters for some expected negativity (it's ~50% from here to its recent high) and they are thinking, well, the market has already downgraded us... Yeah, but, nah, but perhaps the market hasn't quite factored in just how negative this is, hence the "may" or indecision about if they need to release this little bombshell.
For it to bring on a trading halt though, how bad must it be? How long does the marketing department need to put a positive spin on it? Don't they know that everyone else knows that bad news comes in threes haha and to just tell us already?
Ok, I really want to know what it is!