Caterham may not make it either you never know with them.RasputinLives
I do wonder if a number of the drivers who started in Japan are:
a) Not on the grid at the start of 2015
b) Not on the grid in Sochi.
I suspect that Sutil won't be there in Sochi, and I also suspect that Marussia will not want to race...
These sorts of events are also the sorts of events that make drivers consider whether they wish to continue racing generally!