I'm a bit skeptical of D2 remaster because its going to be a huge asspain compared to say Starcraft.
Mainly its that rag doll/ body parts system used to build the player characters and some monsters. Arms, legs, heads, weapons etc. are all independent sprites, you can sort of see them looking at transparent shadows and seeing the odd overlaps in the player outline. This was done so they could cheaply make more diverse appearance for armor (there's only three armor classes for each body part, but many different combinations of body parts for a given base armor type.)
What made the whole system work for the artists is of course that they had everything modeled in 3D. They had their scripts isolate the different parts and render their animations in each direction as sprites, which would then be re-assembled in realtime by the game engine.
As I recall for Starcraft remaster, even though most of its graphics were also prerendered, the remaster team redrew them by hand. Lots of work but a bit more feasible when the only multi-part thing is like maybe the archon to make its transparency effects work. Still though you have to wonder why they didn't just start with the old models rendered at a higher resolution and maybe do a few touch-ups. And that was with a Blizzard South property. Chances seem higher that Blizzard North assets got lost in the studio closure, Brevik seems to think that the D2 source code is lost (making a significant remaster near impsosible alone), let alone their arcane models and rendering scripts to cut up the player parts while positioning them correctly.