According to the
attached Forbes interview with Hyatt CCO Mark Vondrasek issued last week, when asked about the unraveling Hyatt-MGM partnership he said Hyatt has "quite a few" projects for Las Vegas, including the Dream on the southern end of the Strip and the Rio becoming "multiple" Hyatt-branded properties... so it would appear that the plan to outwardly Hyatt brand the towers of the Rio is still happening.
I would expect the Rio to join Hyatt as an independent property later this year, until renovations reach a satisfying enough point to rebrand the Ipanema Tower as a Hyatt Regency and the future renovations of the Masquerade Tower to yield one or two more individually branded properties.
khabah