So we can see that maximum drama will occur if Webber-Vettel come 1-2 (in that order) and both Brawns finish out of the points for the next two races.
Button and Vettel will tie for points (but Button will still win), Webber will beat Barrichello by half a point for 3rd and RBR will beat Brawn by half a point for the WCC.
The fight for 3rd in the WCC is pretty much between Ferrari and McLaren with Glock out for Toyota but you never know what could happen. The 2 points that separate Ferrari and McLaren also separate Kimi and Lewis for 5th place in the WDC.
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Rain is predicted for the race, pool picks are likely fucked.