All the focus seems to be how many cars get to the finish this weekend, but I'm seriously expecting at least 1 to fail to make the starting grid, either due to a failure in quali that the team can't repair in time, a breakdown on the formation lap, or fail to get off the line.
So... I'm going to guess that 3 fail to start
1 Caterham
1 Lotus
and possibly 1 other with a failure when the lights go out (in similar fashion to Kimi's false neutral when attempting a practice start in FP)