Just like old times, Lego sets for the movie Captain America: Civil War seems to have revealed a very significant detail.
The business of movie promotion is very complicated and in the quest for more spoilers, even toys have been seen a source.
The Lego sets for Marvel movies have been very faithful to the actual movie events. The only problem is that they are released before the actual movie.
Comic Book Movie had photos of the Civil War Lego playset. It can be viewed here. They also gave a rundown of the characters in various battle scenes. "Three battles: one with Winter Soldier, Black Panther, and Cap; the second with Falcon, Black Widow, and Crossbones; and the last includes Cap, Agent 13, Scarlet Witch, and Winter Soldier, as well as War Machine, Iron Man, Ant-Man, and Giant-Man."
It was already confirmed that Ant Man would be in the movie. However, there were some eagle eyed fans who noticed that he was absent from the trailer. Then came the speculation that maybe he was in ant-sized form.
It seems like the opposite is true if the implication of the Lego set pans out. It is not totally reliable, of course, as sometimes the sets involve scenes that do not make the final cut. These are manufactured even before the filming wraps.
In the comic books, Ant Man did become Giant Man as the principle of mass reduction also applies to mass increase. What Culture has mentioned: "As witnessed in the Ant-Man movie, where we saw not just a tank but a tank engine be blown up to ridiculous sizes, the tech exists to make people 'go giant'. So it's certainly not outside the realm of possibility."