Meh, she wont be champ in the UFC because by the time there are enough relevant 145 women she'll be retired.
She has no problem beating scrubs for her 100k payday and I dont see that changing anytime soon. She's already said she'll only fight Tate or Rousey in the UFC at catchweight, has no interest in 135, and really wants to fight on only big money cards like NYC, or on the Mayweather/McGregor circus card. She doesnt care about helping to build a 145 class and there is NO indication that the UFC is trying to build one out of the few top fighters spread across 3 organizations.
So no, unless the new UFC overmasters decided that they need to build a can crushing division WAY more shallow than WBW, there wont be a UFC WFW and Cyborg wont try to drop some of the muscle to make 135.
4 years of this speculation crap and Cyborg has become even more intractable in her position as Queen of Crushing Smaller Cans. More power to her, I guess.