It was indicated a Death Note was still out there, the end of Death Note showed Misa holding a book, additionally  she did give up half her natural lifespan to gain the shinigami eyes, but she also had two shinigami sacrifice themselves to save her, that means she assumed the rest of their natural lifespans. So do you think Misa truly became the 2nd Kira after Light died?

"It was indicated a Death Note was still out there, the end of Death Note showed Misa holding a book, additionally  she did give up half her natural lifespan to gain the shinigami eyes, but she also had two shinigami sacrifice themselves to save her, that means she assumed the rest of their natural lifespans. So do you think Misa truly became the 2nd Kira after Light died?"