That doesn't make a lawsuit based on warrant exercise any more likely to succeed.
In the released documents, Treasury said that it insisted on the warrants to drive the share price down. It had nothing to do with being collateral in case the companies couldn't pay back the bailout money.
That doesn't even make sense on the surface: if AIG/Citi/FnF were in bad enough shape to not be able to pay back the bailout money, the shares from the warrants probably wouldn't be worth enough to Treasury to make up the difference.