Apparently he was "ex-communicated" from the WBC late last year, so I'm thinking that unfortunately, no, the WBC will not die out with Fred. Perhaps if Shirley was also unwell it could possibly fall over, she seems to be the more vocal of the two now.
I've perused their websites today for a look - nothing is mentioned.
Unfortunately, hate breeds hate, and whilst the original Phelps 'children' of the Church (not his children, but theirs) are all coming to their senses slowly and leaving the Church and the family, the others are indoctrinating the younger children, the vulnerable small kids who have NO IDEA why or what it is they are picketing.
I'm wondering if he should be picketed at his own funeral, or should he just be left to fade into insignificance? Is making a big deal of his passing doing more to promote the church? Should we just leave him to disappear?
I read a blog today about his imminent passing - whilst he has done much harm with his hatred and preaching, he has had an effect that we did not expect nor did he I would bargain - he and his family/church have brought anti-gay/muslim/etc hatred into the mainstream collective knowledge - fighting hatred is made easier when it is out in the open.
I'm hoping it disappears, but I'm sure its too much to ask for in my lifetime.