I fear that this will have absolutely no impact on Blatter's continual dictatorship. Indeed, would be shocked if it did.
Warner has not been an ally (nor relevant) for some time, so if he is one of those arrested, it's likely Blatter is strengthening his position, if anything. Or like before, merely sacrificing some irrelevancies or his opposition in a laughable attempt to keep the west (well, FIFAs major sponsors at least) happy.
Though I happen to believe football would be in a far better place without his influence, I have a healthy respect for the way he has brazenly manipulated the FIFA cabal all these years, it must take some skill to implicitly endorse vast quantities of corruption yet appear to remain, to the authorities at least, unimpeachable.
I fear his rival stands no chance, nor would expect no real change even if they did win.
The election is sadly democratic; each member nation gets one vote, since virtually all of the football associations owe their money and vote to Blatter, they will not bite the hand that's feeds them, since potentially voting him out may cost them their lines of undeclared income.
Hope that's cynical enough for everyone!