The funny doujins are nice but I prefer this dark and dramatic doujins and Silver did a good job.
And to the question what happened with HomuHomu's parents; it's pretty clear that they are dead. Some fans have the theory that Homu is an orphan and lived most of her live in a katholic internat. (Well she was in a katholic school after all.) Which makes a lot of sense to me. She's an anime character, it's normal that they doesn't have any parents.
It'd be nice if the concept movie ended up being a little like this
I'd be nice to get one or two news about it.
(But I think Butcher and the others don't have any time to work on the concept or don't want to give any information)