It's actually not too bad for Button, no points for Vettel and 3rd for Webber. He still has a nice lead. That said, he does need to get some serious points if he wants to keep it alive. It's going to be close again this year.
Already a rumor for who's gonna replace Massa(because it's pretty sure he won't be able to attend atleast 1 race) Micheal Shumacher!!(pretty farfetch i know lol but.)
His doctor (and the responsible of the medical part of Brazilian GP) said to brazilian TV that sometimes he wakes up from his sleep and exams are made on him. There is no risk of death, according him.
Edit:
What a pity for Badoer, will never race for Ferrari... XD
Btw there is still 8 races to go i think this is Redbulls championship but hamilton and kimi could possibly catch up to button(look how terrible there car is, and even worse how button sounds winging about it).