You've seen most of the good scenes in the trailers (hate that). The Hank/Janet story meshes well into the MCU. Mid- and post-credit scenes. Don't miss them.
ETA: Would anyone be interested in playing the Dagger to my Cloak? I have an idea that I want to use. If no one is interested in Dagger's powers, that's fine. I'll just have it on the wanted list for later. I've got a big idea in my head and we can discuss it if anyone is feeling up for it.