There are some factors that might point towards it being a series. With the popularity of streaming platforms, a series could attract a dedicated fan base that can follow the story over time. It could also allow for more in - depth exploration of the Star Wars universe. However, a movie also has its appeal, as it can reach a wide audience and create a big impact in a shorter time frame.
Well, the trailer uses a combination of elements to set the mood. The imagery of the characters in their battle gear, facing off against the might of the Empire, creates a feeling of underdog - ness. The scenes of destruction and chaos, like explosions on planets, give a sense of the great threat that the Rebellion is up against. And the little snippets of dialogue, if there are any, can be very telling. For example, if a character says something about sacrifice or hope, it sets the mood for a story that will likely be about those very things. The trailer as a whole makes you feel like you're about to embark on a thrilling and dangerous adventure in the Star Wars universe.
The next Star Wars story could be anything. It could explore different eras in the Star Wars universe or introduce completely new concepts. But as of now, there's no definite answer.
It's hard to say for sure. But it could be a story set in a different era of the Star Wars universe or involve some familiar faces in unexpected situations.