Seems might risky, NHBB. Delta has said they could get about $200 million in savings through aircraft lease renegotiations and would like to push back some of their debt due next year but other than that there is no other reason for them to file bankruptcy. If DL files for bankruptcy, it will be almost exclusively to restructure the pilot agreement; as such you will pay mightily for forcing them into bankruptcy - far, far, far more than you would have to give up under a voluntary restructuring. The comparison for pilot costs now is UA and AA; if DL goes in bankruptcy, they could change their business plan, making the comparison B6 and FL. At that rate, you'll be flying a 777 for not much more than one and a quarter per year.
Thankfully, lots of other stuff I'm reading says the vast majority of DL pilots recognize its time to give while they have some control over the outcome. Delta is too great of a company to end up on the ash heap of the industry - which is likely what will happen if DL files for bankruptcy. Remember, there is no ATSB loan opportunity for DL which is the only hope UAL has of pulling out of its nosedive.