I made this prediction on the most recent Westminstenders thread, and @Peregrina suggested we needed a thread solely for predictions. So here's mine:
I'm going to put my prediction hat on and say there'll be a vote of no confidence immediately on return in October, amended (allowed by Speaker Bercow) to say the house has confidence in Ken Clarke. He will implement the Benn act and ask for an extension. The EU will refuse 3 months and offer 2 years. Parliament will accept and then have a fixed term parliament act vote (2/3 majority needed) for a general election, which will happen in Nov/Dec.