I think the goal is Bianca. Like I've been said b4...the story is already there. It was there ever since Bianca...Jade...Naomi teamed up until Naomi turned heel.
Rhea can lose and not affect her at all. She's already made. Cuz it doesn't make since to have Jade form this faction...only to have her lose the belt. Again...Rhea is the Plan B option. They needed a big match for that title, just to fill in the hole Bianca left wit her injury. So in essence...Rhea is a placeholder until Bianca returns.
And them forming that faction could not wait. This was WWE's way of getting fans invested sooner than later. This was a move to inject life into this feud. So they had to pull the trigger now, rather than wait til WM. And...it worked.