This is the high time that both Dravidian parties should desert him. Let him contest the elections alone. After a couple of elections, his party will be a letter-pad party. It's very clear that he was losing ground in vanniyar belt. I hope ADMK too won't be interested in PMK as they've become more unreliable now. Since PMK has been thrown out of DMK alliance it puts PMK no where to bargain something with ADMK.
A few months back one of the tamil magazines reported that Jayalalitha confirmed Karunanidhi thro' Vijay Mallaya that she wont be interested in PMK even if he's thrown out of DMK. I dont know how it's going to turn-out now.