While we all speculate about renovating/revamping Old Virginia, here's my take on the most realistic short-term possibility. With the wing coaster coming next year, possibly a new paint/retheme for Project 305 and rumors of a chicken shack renovation, there is so much going on in the upcoming off season, and maybe even during this season in that area. Even with rumors of minor or major upgrades to FoF or Backlot themeing, and/or a new Anaconda queue entrance (opening up the trees to watch anaconda from a new seat location would be really nice) I think there's a strong possibility that most or all of Jungle X is CLOSED for Haunt this year. This will be a huge blow to Haunt, taking out one scare zone and an entire section of popular rides that otherwise is always open for Haunt, but I think this is extremely likely.
Now, focusing on Grand Prix closing, I think in exchange, KD may keep Grizzly open for Haunt, which always has great night rides, but is never able to open because of GrimmWoods. It's probably past time for Grand Prix to close permanently, as it's been rumored for years anyway, but I can see some very minor fencing modifications and come Haunt, use some or all of the Grand Prix racetrack for a rerouted GrimmWoods queue line, while Grizzly can finally remain open as the Gulch store and Grizzly plaza can allow guests to get to Grizzly.
With so much going on elsewhere in the park, I don't see major additions or GPR replacement coming to Old Virginia for at least another year, but I do think it's a strong possibility that they use the racetrack with minor fencing mods to allow Grizzly to open longer this year while they close down Jungle X earlier. Not exactly a fair exchange, but better than nothing. Also to compensate a Jungle X closure, maybe even add a new Haunt attraction in the front half of the water park in a temporary building/tent (which could also play into Haunt starting one week later this year). Thoughts?