Avengers Enemy Within #1

"THE OPENING SALVO TO THE HOTLY ANTICIPATED AVENGERS/CAPTAIN MARVEL FOUR PART EVENT! • Can't keep a good Captain down! • Vicious echoes of the Avengers' past are cropping up all over Manhattan and a grounded Captain Marvel refuses to be left behind. • Who is the sinister figure behind these incursions and what does it have to do with Carol Danvers' mysterious condition? • But is this villain real or just a figment of Captain Marvel's increasingly deadly imagination?"