If we follow that Levi overhead them talk about heir dreams and seeing the ocean we could say Levi will not let him die or any of them, sacrificing himself but that will come later if he gets out of this one right now. But I'm pretty sure one of the two will die.
As for the next Titan, Levi will not do it. I think people for oft about the only survivor that was left in the last pages of the chapter, so they might go with him