From an insider on WDWMagic:
That basically guarantees something stupid.I think the new queue area will put some scared little ones more at ease. Not cheesey sight gags or anything just a little light hearted insight to what lies in store for them beyond those doors. I have adult friends who still won't ride it because they swear something is going to come out and grab them.
The expansion of the queue isn't even that large. About 6 or 7 items are currently planned for that area and only incorporate the area the current cemetery is in. Directly past the turnstyles the additional queue will turn left into the new area and rejoin the existing queue a little further down. The reason why I say "additional" queue is because it could simply be gated off if needed. The existing path to the door after the turnstyles will remain. This construction could take up to 6 months. Electrical and plumbing needs to be installed before anything else.