Superman borrowed $5,000,000 from the First National Bank of Metropolis to construct his Fortress of Solitude. As a condition of the loan, FNB Metropolis required Superman to purchase a $5,000,000 term policy on his life and assign it to the bank. In addition, FNB Metropolis purchased a $5,000,000 policy of property insurance on the Fortress of Solitude. Lex Luthor learned of Superman's construction project and purchased a $2,500,000 policy on Superman's life and a $2,500,000 property insurance policy on the Fortress of Solitude. Five years later, after Superman has paid down his construction loan to $3,000,000, he is subjected to irreparable damage from a kryptonite explosion (likely orchestrated by Lex Luthor) and dies as the Fortress of Solitude is reduced to worthless rubble. The insured parties seek to recover. Who recovers what?

FNB Metropolis' $5,000,000 term policy on Superman's life assigned to it:

FNB Metropolis' $5,000,000 property insurance policy on the Fortress of Solitude:

Lex Luthor's $2,500,000 policy on Superman's life:

Lex Luthor's $2,500,000 property insurance policy on the Fortress of Solitude: