Yes, says J Plender of the Financial Times:
"Consider, first, the over-the-counter (OTC) derivatives markets, the opaque multi-trillion-dollar Sargasso Sea where so much systemic risk resides. This is a huge source of profit to the biggest banks, and an equally huge source of loss to the taxpayer when toxic derivatives blow a hole in balance sheets, as at Lehman Brothers and AIG."
So, yes, it could happen again. Risky securities attract bankers the way shit attracts flies.