I do not think your H changed his mind about Disney because of your planned trip to Germany, frankly. I think that is the excuse he gave to himself (and you). He is probably too scared and conflicted right now. Scared of actually enjoying himself with all of you, of realizing that you are not the person his (temporarily) deranged mind has created and blames for all that is wrong with him. Do not take it personally, it is not. And do not feel guilty about it either.
It is his loss. You enjoy your trip. And take care of yourself
"You don't throw a whole life away just 'cause it's banged up a little"
Tom Smith in "Seabiscuit"