Cross is refering to the legend of the original Ant-Man and says something to the effect of "It's truly tales to astonish!".
At the end of the film when Falcon is looking for Lang his contact says he needs to be more specific about the powers because they have a guy who crawls on walls and swings around (Spidey obviously)
After Lang best Falcon he radios to somebody and tells them he really doesn't want Cap to find out about this
Mid credit scene is Hank giving Hope the Wasp prototype suit
End credits scene is Cap, Falcon and Bucky saying they can't call Stark about their current mission and Falcon says he knows who to call (Lang)
When Hank tells Lang about how dangerous the mission is and why it's so important the first thing Lang says is they should call the Avengers
That's all the ones I can remember off of the top of my head right now
Mmm I don't think its the prototype suit. It looks completely different. The new Wasp suit looks more modernized. I freaking love the Wasp scene. And the credits scene. Makes you actually desperate want to watch the sequel. I have a feeling Wasp might feature in Civil War as well. At least in the final act.
There are some concepts that are teased that might be important in the MCU.
Growing. One thing Cross cannot do is enlarging. Pym has been playing with that concept. The scenes involving the train, ant and tank are great.
Quantum Dimension/Zone. I wonder if they want to use like the Negative Zone in Civil War. Keeping the arrested supers contained. They found a way to get out, so why the hell not. The quantum dimension itself is very much like Interstellar.
Spider-Man is referenced. I'm surprised no one caught that.
Hank Pym is a very clever man.
I wonder why Cap and Falcon are not in costume. Why they need Scott was not explained. I wonder when this scene takes place in Civil War.
Man, Falcon needs some serious training. He gets completely destroyed by Scott. I actually feel bad for him.
One nitpick. In the first scene in 1989, there were four characters. One of the characters got punched by Hank. In present day, the guy did not grow old at all! Maybe they missed out on that.
There are scenes in the movie that got the cinema bonkers and cheering. I have to imagine that everyone loved the movie.
Two quotes to end my post.
I fought an Avenger and I didn't die!
That is one messed up dog!