Civil War was a massive story ARC in the comics which was very well told, its natural that the creators of the Marvel Avengers Cinematic Universe want to recreate this story, we are waiting on the inclusion of Spider-Man in the franchise now also! they have just Created Daredevil the netflix origional series which may also join the cinematic universe in some way!
i cant wait to see this film dont forget they have to come back together in order to fight in the Infinity War which is the next big avengers film! and its in 2 parts! im so excited for this!