D4…maybe…not so sure though, with the length of time it will have taken to get the game out. D2R though, was the right call not to announce then. They probably had nothing to show in the new engine, and would have been constantly harassed for how long it was taking to do a remaster. Look what happened with FF7 remake; reveal was what, 2015? Released in 2020, for part 1 ONLY in a multi-part game. IF D4 manages to release next year, by end of year, we’re looking at 3 years from reveal to launch.
However, for copies, I posted in another thread, I believe launch will be around 1-2 million. I believe that the current scandal will have some spillover into sales, as well as the game being less mod friendly, and not enough new features for people on the fence to spend the money.