Here's my fearless prediction: They will keep the 144,000 number as literal, but allow the number of "anointed" ones to grow without limit. I.e., a return to the "2 heavenly classes" of Russell's time.
I don't think anyone's creative enough to bring things back to that old light. Even though they opened the door just a crack to let the post-1935 annointed in, something tells me that they are still interested in keeping heaven tightly shut. A figurative 144k would be the easiest fix to their slightly opened door.