I have a fear that they'll remake it just like they did with Fallout. Ignore everything that made the game great except for the most superficial surface parts and cram it into an engine that isn't really a RPG engine.
Really? I didn't care for Fallout 2 or Fallout Tactics, but I thought Fallout 3 was one of the best games I've ever played.
I would guess, then, that you're more a fan of FPS or more action-oriented games in general than tactical turn-based games.
I enjoy Elder Scrolls, and I could enjoy Fallout 3 as "Elder Scrolls in a vaguely Fallout universe", but I really love the old tactical turn-based games.
There was no point in making it a "Fallout" game, though, since the people who would really come to the game because of being an FPS are people who didn't like the first few Fallouts in the first place, and the people who did would just be pissed off that you took their franchise "away from them". You could have just started out with a whole new storyline with just as much effort. It's not like there aren't a ton of other post-apocalyptic wastelands out there in the genre.
But that's really what this thread boils down to (DRM stuff aside) - DF and Diablo are radically different types of games. Look at that thread about the three things people play DF for, and then look at Diablo - where in Diablo are you going to be able to build a giant statue of a dwarf that pisses magma at invaders that makes Constructionists happy? Where in Diablo is there going to be a giant simulation that you can just sit and watch and enjoy the massive complexities of the world around you?
Even for the gamists, there's an entirely different game to be enjoyed. Diablo is both a power gratification game and a slot machine/Skinner Box with its loot drops. DF is about management and logistics and overcoming obstacles through indirect means.
We're talking about games that have wholly different appeals to their audiences. Only a tiny minority will have that rare intersection of tastes where they will both like what Diablo offers and what DF offers, because there isn't anything that both games offer to their audience.