Looks like Josh Whedon wasn't just sitting on his thumbs during the writers' strike:
1) Why, Joss? Why? Why now, why free, why us?
Once upon a time, all the writers in the forest got very mad with the Forest Kings and declared a work-stoppage. The forest creatures were all sad; the mushrooms did not dance, the elderberries gave no juice for the festival wines, and the Teamsters were kinda pissed. (They were very polite about it, though.) During this work-stoppage, many writers tried to form partnerships for outside funding to create new work that circumvented the Forest King system.
Frustrated with the lack of movement on that front, I finally decided to do something very ambitious, very exciting, very mid-life-crisisy. Aided only by everyone I had worked with, was related to or had ever met, I single-handedly created this unique little epic. A supervillain musical, of which, as we all know, there are far too few.