I don't believe a 3080 class GPU will get anywhere near the current 2080Ti pricing, the only way that would happen is initial pricing gorging due to supply issues or Nvidia fundamentally not intending to sell that many and looking to reap the highest margins.
3080 is also within possible Big Navi performance, they would open themselves to potential embarrassment from AMD if they price it incorrectly. Sure they could drop prices but then they expose themselves for the price/margin gorgers that they are to their own customer base no less.