The eligible candidates are (in my opinion) IN10 Media, Enterr10 Network and Sri Adhikari Brothers.
Shemaroo and Goldmines are least expected to show interest in buying these three channels. Shemaroo has just entered the broadcasting space and they are testing the waters.
No regional players will buy these channels. Especially the big networks in the south like Sun TV network and Ushodaya enterprises limited (ETV).