They can always brand it as Hilton Ampang or Hilton KL City Centre. The Hilton name is very strong in Malaysia.
I may be wrong but the original name Crown Princess may have a stronger appeal than Doubletree for the local/regional market. It may end up like The Imperial, nobody could recognise the Luxury Collection brand and it was eventually renamed back to Sheraton Imperial, at least everyone knows what Sheraton is all about.