If Villa can beat Chelsea, Arsenal will be even more up for the Wigan game as a win will put them third and in a position where they wouldn't have to play in the CL qualifiers.
I'm not too sure that will have any effect on Arsenal. They already need to win to hold off Spurs. Whilst people like to say it, giving more than 100% doesn't actually exist. Chelsea win, lose or draw today, Arsenal will still be going all out for the win vs Wigan.
Wigan won't be too pleased with Lee Mason, unless he gets a second yellow. A red card for Benteke could have a major difference on who goes down.
It may only be one game, but it sounds like we could have a decent MOTD on our hands tonight. Just a shame that Savage is on.