death or both.
Hank & Jan divorce
Black Widom & Red Guardian-death
Wanda & Vision- divorce and death
Hawkeye & Mockingbird- divorce & death
Mantis & undead Swordsman - um, death
Namor & Marrina - death
Hellcat & Maddog & Hellstorm- divorce
Quicksilver & Crystal -seperation
Tigra & first husband- deaAnt-man & first wife- dead
Lionheart & first husband-divorce
Wolverine & Viper & whoever else-divorce and death
She-Hulk & Man-Wolf-seperation
Arachne & Mr. Carpenter-divorce
So far only Stingray and his wife, Reed & Sue and Black panteher & Storm have avoided this.
Both Peter and Cage's marriages are not within the Avengers' context- Peter and Mary Jane's marriage is totally in the realm of the Spiderman books and any upheaval should happen there. Besides, MJ is quite capable of dealing with a superhero wife status, she's been doing it for years. She fit in Avengers Tower like she's been living there for years, and though that's not the case anymore Peter and MJ are a couple whose marriage is stronger than most of Peter's other associations, Avengers included.
Cage and Jessica Jones will survive because Bendis simply loves to use both characters. Jessica knows the game already and is quite used to the superhero tribulations in married life by now. As long as Bendis writes Cage and Jess, their marriage and new baby will be the status quo for a long time.
As for Sentry, no one else can define him. WIthout Mrs Reynolds Bob is a total stranger to the rest of the Marvel Universe.