A few things off the top of my head which you might want to go into:
Simple
1) Monetization of various assets - Specifically debt.
2) The role of leverage in the current crisis
3) The failure risk modeling in the "long tail"
Less simple
4) Underlying assumptions in the orthodox model general equilibrium models (Arrow-Debreu)
5) Path dependent nature of general equilibrium if agents allowed to trade in out of equilibrium prices.
6) Existence of multiple equilibria, and assumptions required for number of equilibria to be finite.







