Ricky Martin‘s big comeback has hit a snag. Ticket sales for the US tour of his new album, “Musica + Alma + Sexo,” have got off to a slower than expected start, with floor seats and prime lower-level seating still available days after tickets went live on Ticketmaster.com. Industry insiders believe the tour could be a financial disaster if the venues aren’t 60 percent full, and say Martin could face the same fate as Christina Aguilera, Rihanna and Janet Jackson — whose Live Nation tours suffered massive cancellations. “The people around Ricky have not connected the dots to make him relevant,” one source told us. “He’s been doing all these interviews about being a gay man and the focus has shifted to his personal life rather than on his music.” Martin’s rep said, “The tickets only went on sale four days ago and the promoters are happy. No date is in any sort of jeopardy at this point. His album is extremely successful, debuting at number three on the Billboard 200.”