Honestly at this point, the rumor is just titles of "Civil War" and "Last Son" to be used and chances are the story will only be slightly based off of it, don't expect to see too much similarities in it, at least not at this point.
Remember Age of Ultron is just a title and outside of Ultron, chances are that is all the similarities the film with have with the book.
And why are some of you even so sure Spidey is coming to Marvel.
I'm not going to believe anything unless Marvel or Feige officially? Even the source who heard the "rumor" says to take it with a grain of salt.