There really isn't much to expound - it just takes longer to do 2 things than 1 thing, even if they are related. A bachelor's degree typically takes...
Funny enough, the first Blade movie came out about two years after his guest appearances in Spider-Man: The Animated Series, which reinterpreted him...
'Why?' Just to see the disappointment on your corn-fed, gee-whiz face, Superman. And because a great dark voice on the edge of nothing spoke to me and said you all had to die. There is no 'Why?'