I personally won't think it will be $1500. Everytime there was a price leak prior to launch for Nvidia cards, they have been incorrect. Since they are using the same process node as Lovelace with similar amount of cuda cores, I really doubt we will see much of an increase if any for 5080.
PC Specs: CPU: 7800X3D || GPU: Strix 4090 || RAM: 32GB DDR5 6000 || Main SSD: WD 2TB SN850