No. No it does not. The entire purpose of a trailer is to advertise the film. Let's ask the good folks at Merriam-Webster what a trailer is in the context of a film:
trail·er noun \ˈtrā-lər\
: a long platform or box with wheels that is pulled behind a truck or car and used to transport things
: a vehicle that can be pulled by a truck or car and that can be parked and used as an office, vacation home, etc.
:
a selected group of scenes that are shown to advertise a movie
Note that nowhere does it say a trailer has to be an MPAA rated short of a specific length that plays ahead of a film. A "trailer" is really just an advertisement in the form of a scene or clips of a scene. Let's also remember that there is such a thing as a "teaser" trailer that often consists of footage made ahead of the actual film. Looking at all of this, Ant-Man has had
multiple trailers, and it's been getting them for quite some time.
There was a teaser trailer shown to an audience back when Wright was still involved. It was not available to the public, but it was absolutely a trailer. Much of this footage was later made available to the public in a Marvel TV special watched by millions.
In other words, the public totally got an Ant-Man teaser trailer.
We also need to take the latest Marvel TV special into account. It featured footage from a group of scenes as they were being filmed. It was, in a behind the scenes way, a form of a trailer (because a trailer is really just a word for an ad).
I'd suggest that comparing Fantastic Four to Ant-Man may not be the wisest move. One has little to no promotion months ahead of release. One has been advertised to millions of people over a year ahead of release.