Preferably a new game instead of holding itself back to the old games. If they did a remake of the original games it would be debatable of which format. A 3D or Isometric games.
Turning isometric games into 3D can be done well if done right. The community-made fallout 1 recreation in fallout 4 replaces the grid travel map with 5 different regions, effectively allowing for larger scale exploration and immerses exploration