Considering the fact that last year there were 5 seperate crashes, 3 of which resulted in a red flag, and one of which gave a lot of people a penalty for setting a fast time in a yellow sector. I cannot see it as being faesably possible that on a damp track, with very little repair time after the session, that everybody will be able to take part. 4 drivers where involded in car-wreckers last year, none of which could be fixed in the space of 3 hours.
Could be interesting. Imagine an Alonso or Vettel failure, the championship would probably go down to 2 challengers in a few hours, or Webber crashing out again leaving everything wide open. Or Button winning or even a 1-2 in any of these situations. This is why F1 is so great, so many unknowns that could happen before the chequered flag, it seems nowadays with the reliability of the cars we take results and stability for granted but there are always surprises.