It's not going to cost that much. This is a classic motte and bailey situation engineered by Rockstar's PR department in order to gauge consumer reaction to increased prices.
This will be the subject of every single daily YouTube gaming commentary show and enthusiast gaming podcast for the next few months. It will be a talking point designed to generate buzz for the likely reveal at The Game Awards in December.
The base version will likely cost the current standard $69.99, but it will cost $99.99 for the most premium version, which will likely come with Shark Cards or other bonuses tied to the next generation version of GTA Online.