Arsenal is currently a sinking ship and many of the rats are looking to desert.
Clichy has already gone (although he's not been great for a couple of seasons) but Nasri and Fabregas also want out and they will be huge losses to Arsenal. If they go the likes of Van Persie and, er, that other player who's quite good, will also probably consider their future at the club.
Wenger is a wily old fox but I doubt even he could keep Arsenal in the top 4 if Nasri and Fabregas go.
Assuming they go, I think we'll beat them to 4th place next season.