It's a reboot of Superman set in an all-new DC Universe, so it's going to be a fresh start. Plot details are vague, but Wikipedia says it will "follow Superman's journey to reconcile his Kryptonian heritage with his adoptive human family in Smallville, Kansas."
This film has been highly anticipated since it's announcement in late 2022. A lot of DC fans and superhero fans are excited for this, since they feel that James Gunn (director of Marvel's "Guardians of the Galaxy" trilogy) will finally be the one to get Superman right.