fusi0n
I agree with most of the replies that the original logo shouldn't change.
Sure logos get updated for companies, or altered for promos/spinoffs, but this is mostly a symbol, like a traffic sign, or the “No Smoking” sign, they don't get changed or updated. This is the No Ghost sign.
I think that maybe a slightly altered logo can be used for the promotion of say a new movie, all you need is the no-ghost logo with a hint of change.
Ageed!