WB Discovery CEO sells $1B music library to trim loan.
Zaslav took steps after the merger: firing execs and merging with BT.
WB scraps projects: Batgirl, Scoob!: Holiday Haunt.
Removing Cavill as Superman and Affleck as Batman continues to hurt WB.
Warner Bros. music division was created in the 1950s and sold in 2004 but retained copyrights.
The public criticized the decision to sell music tracks from decades-old collections.
Zaslav aims to reduce the financial burden by selling tracks in a hot market.
CFO justifies action: "Consistently & continuously looking at how we're running the business."
Process in initial stages, access, and the number of tracks unconfirmed.