This is so sad... Its like some kind of drama, I feel like this kind of thing is so rarely found in real life. It was very honorable of him, I just feel bad that so many people will misunderstand it.
I guess he just wanted to announce it to the public because their marriage is a symbol of their love, even after death. Maybe he wanted them to be recognized as a married couple, like she would have wanted.
>>14 Marriage laws can be quite loose, depending on where you go. Check out this guy, for instance:
http://www.metro.co.uk/weird/816601-man-marries-pillow
Not quite as honorable, but weirder.