I don't think Cyborg could get down to 135. Tito said on a podcast that she walks around close to 160, and has had tough weight cuts in the past. She's also had conflicts with the UFC when they took over Strikeforce because they weren't going to have a 145 division. 145 is probably the least deep division amongst the women's divisions. UFC just added 115, which is telling because even the lower divisions have more appeal than 145.