With the way makers are blatantly & openly manipulating evictions one after the other, I can understand where they're going with all this & what is their end game planning.
Makers want the final 4/5 to be Rubina, Eijaz, Nikki, Jasmine & Pavitra/Jaan, so in order to achieve that they'll wanna cut Rahul before the finals, as he's not part of their planned narrative, him becoming one of the most popular contestant all of a sudden wasn't part of their endgame narrative that they were aiming for (which is Rubina VS Eijaz).
So to cut Rahul before finals, makers will nominate him alongside the other most popular contestant who can beat him which is *ONLY* Rubina as Rahul will beat everyone else in votes (same thing happened on BB10 when Rohan was nominated with Bani to ensure he gets evicted, & they can save Manu for final 4, or on BB11 when Luv was nominated in the mall task to ensure he gets evicted & Puneesh makes it to final 4).
At the final week, expect a nomination between Rahul & Rubina.