At today's Winter TCA panel for NBC, network chairman Bob Greenplat stated that the peacock network has no plans for a second season of Heroes Reborn. But it's not a ratings or quality issue. Creator Tim Kring simply never planned for the series to continue beyond one season.
"That was always the plan, unless Tim woke up one day and said, 'Oh, I have another chapter to tell.' But I think we're coming to the end of the world, maybe. Stay tuned."
The season finale is scheduled for January 21 but it looks more like that's going to be the series finale.