What do the scriptures say about would be the survivors after end of Kali Yuga?
According to the Puranas, the devotees of God will survive at the end of kaliyuga.
brahmandani viinashyanti deva indraadayastatha/Kalyaanabhaktiyuktascha madbhakto na pranashyati, meaning that when the worlds and the devas like Indra are desroyed [during pralaya]], my devotees wih good qualities are not desroyed. Ref. Omkarnath Rachanavali, vol 6,page 28).
The Saura-Purana says
jagatah prlaye praapte nashte cha kamalodbhave/madbhaktaah naiva nashyanti sveachchavigrahadhaarnaha, meaning at the time of pralaya when even Brahma can not survive, my devotees taking the forms according to their wish always survive(Ibid page 33).