Haven't heard anything specifically like that though I've always thought that, sooner or later, they will have to revise the 144k doctrine.
Something along the lines of: "For some time, our publications have said that the 144,000 figure is literal. However, after careful consideration was given to the context of Rev 7, it became necessary to adjust our understanding. Does the number of anointed brothers of Christ really need to be exactly 144,000? Not necessarily blah blah blah...."