In just two and a half weeks, hip-hop’s revered poet Kendrick Lamar is poised to unleash his highly anticipated new album, “Mr. Morale & The Big Steppers,” a project shrouded in mystery and excitement that promises to redefine the genre yet again. After a five-year hiatus from solo work, fans are buzzing with expectations, eager to witness Lamar’s evolution since his last studio album, “DAMN.”