cap 3 will tease thor: ragnarok

+ Jaimie Alexander aka Lady Sif said: "There's a lot of great stuff they've peppered in through Agents of SHIELD, [Avengers: Age of Ultron], Captain [America: Civil War] will have some stuff. There's just all kind of Easter eggs and hunts, if you're really paying attention. They're so good at interweaving everything throughout those films."
+ She also says that Sif will have a very pivotal part in Thor 3.