Whoever is saying Manor won't race this weekend or complete the season is talking shit.
They have the money. It's not even debatable. So what if they don't have sponsors all over the car right now? They had very little time to prepare. Their investors are saying all the right things, and they'll collect a nice little sum of money anyway for the points they got last year.
Sauber on the other hand.. They should worry more about the power Eriksson has with his backing and the consequences for pissing them off, rather than Nasr and the Banco de Brasil. I can see Nasr going, personally. I'm more interested to hear what Peter Sauber has to say now the management he put in place has fucked up so badly.
Force India will almost definitely fold at the end of this season IMO. We have HAAS coming in, so at the very least there will still probably be 10 teams. Who knows, all those FI assets and facilties would be very attractive for another bored billionaire.