The first trailer is always a sort of non trailer. They just give you a couple hints. This one provided Ant Man escaped the quantum realm, but he has done that on his own before so not surprising. Shuri is missing and presumed dusted. Hawkeye has become Ronin.
The next one will probably feature some action scene that won't be in the movie and is completely misleading. Just like the Avengers 1 trailer did with Hulk.