Top 4 is in the show's montage.
Top 2 also is pretty much locked that it is going to be Sid vs Asim.
Yesterday from 2- 3:30 in the afternoon, bigg Boss was showing the journey of SidSim. Brother turned foes. I don't remember anything like this happening for any rivalry in the previous seasons as well.
Neither they had to send someone of Rohit Shetty's stature to diffuse a fight.
SidSim rivalry is what this season is thriving on and I think even the channel has accepted that now.