Axl Rose, the songwriter and singer behind Guns N’ Roses, has been working on a new album far longer than many bands have existed. Holed up in a mansion in Los Angeles, he’s still trying to top his hugest hit, 1989’s “Sweet Child O’ Mine.” How do great expectations turn into no expectations? Jennifer Ordonez has the story, coproduced by Queena Kim of KPCC in Pasadena.