I have to say, I'd be sort of interested in taking a look at this if it had come to fruition. This is just the sort of bizarre, "What kind of drugs are these people on?" idea that would get my attention.
The writer speculates Young Justice got in the way of this, and that's probably for the best. But still, I wish this at least got to the pilot stage.
Link's down. But it does remind me of a pitch website I saw once that featured a teenage Bruce Wayne growing up with Alfred, and getting into adventures with best-friend-eventual-villain Harvey Dent. The series eventually became Smallville and they went with the Dark Knight trilogy instead.
They botched this hospital story up and down. Where do they get water? How do they run the generators? How much gas can they have grabbed to run their cars and equipment? The walkers have been around for about a year (based on Judith's conception age)