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, co-produced by Queena Kim of KPCC in Pasadena.