If the speculations are to be believed, Sujana Chowdary and CM Ramesh are in touch with BJP Leadership already to protect their business interests. Remaining Four MPs might also join BJP if that's beneficial for them rather than remaining in TDP.
When it comes to the Lok Sabha MPs, Kesineni Nani continued to test the patience of TDP Leadership with his damaging acts. This Vijayawada MP who is in touch with BJP National Leaders is provoking Chandrababu Naidu to take disciplinary action against him.
As part of Operation Akarsh, BJP might even lure the two other MPs (Galla Jaydev- Rammohan Naidu) to complete a clean sweep.
Guess, What would be the situation of Chandrababu Naidu if none of the MPs remain in the party in such a tough phase? This is what happens if MPs have business interests rather than working with the sole agenda of social service.