The thing about the Jeep is, even non-SRT's get up to $65k (Summit starts at 60), so the SRT has to come in above that. Current LX/LC SRT's can start around $50k (Core model).
The pricing should be interesting though, especially since you now have the 6.4L Scat Pack, 6.4L SRT, and 6.2L S/C SRT. I would expect the 6.4L SRT to stay around the same, and the Scat Pack possibly slot in where the Core was. That leaves plenty of room in the 60's for a Hellcat, and they won't price it as high as a Z/28.