Firstly, lets get to the rumour about Ant-Man, details have emerged that there will be two fights between Ant-Man and Yellowjacket. First of all they will be inside a suitcase that is falling to Earth from a helicopter, while inside the suitcase they will be dodging various objects within the suitcase on will be a mobile phone. The second fight which will be the final fight of the film will take place in Scott Lang's daughters bedroom, in the fight the hero and villain will show case their abilities to shrink and grow, also in the fight an ant and Thomas the Tank Engine with be enlarged to giant-sized proportions.
Secondly, we take a look at the details that have surfaced about Captain America: Civil War, the third instalment in the Captain America films within the MCU. According to the report, the film is simply being called "Civil War" in house, meaning the higher ups at Marvel see this as more of an Avenger 2.5 if you will and not necessarily a Captain America film, which is a good thing in my opinion. The film will feature an A star list of heroes, with names likes of War Machine, The Vision, and Ant-Man being reportedly involved with Iron Man's side of the conflict, while on the other hand Black Widow, Hawkeye and Falcon siding with Cap. Scarlet Witch is also said to be appearing in the film, whose side she will be on is currently unknown, along with her appearance, Black Panther is set to appear in the film and will NOT be used to fill Spider-Man's role open from the comics unlike most reports have suggested. Black Panther will appear, serving his own purpose, what that is we do not know as of yet. As for an appearance from your friendly neighbourhood Spider-Man, his involvement or lack of involvement is being kept very hush hush, so he my well appear, however in my personal opinion, I do not think he will appear. He may be referenced in name, but his first appearance will be his solo film in 2017.