It might be a few years, if at all. Carowinds Hurler isn't that bad; not that great either. Honestly it's a snoozefest from what it once was IMO.
For 2019 [Project alpha]:
There are already markers and drilling in the station area where Thunder Road was and the former Sand Dune Lagoon. There are pictures out there showing this, but from another forum site, so I won't share them here.
Share them. Afterall, we're just one big community anyway
From RIGHT HERE
And as far as the flyers coming back this year . . . its a 50/50 chance of it happening