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I will add to Medvaldo and release a patch :) to the list of details:
- The hexagonal grid of the battlefield has been replaced with a square one (justified by the greater number of attack directions, 8 versus 6).
- Fleeing and surrendering can only be done when it is the hero's turn (now you can get into a very hopeless situation).
- Regular units will not be able to use artifacts as in Heroes 4 and in the fan-made expansion WOG, with the exception of the Academy race (more on this below).
- There will be no old heroes from previous parts - this will be a different world (completely unrelated to the previous parts of the series [M&M or NWC WORLD is dead]).
- Regarding diagonal movement, the system is as follows: [the first diagonal move costs as much as 2 horizontal moves, the second as 1, the third as 2, etc.].
- According to the latest statements from Nival, the maximum screen resolution is 1600x1200.
- Nival's answer to the question - "Will the Heroes be able to fly [usually they will not be able to fly (there will be a teleportation spell), but under certain special conditions]?".
- The primary skills of Heroes are Offence, Defence, Spell Power, Knowledge.
- Castle upgrades as in Heroes 3 [Fort-Citadel-Castle].
- You will be able to leave a garrison of troops to guard the mines.
- According to the latest data from Nival, the maximum map size is 144x144.
- The models for the game were created in the 3D development environment Mays.
- Artifacts and potions can be sold.
- Spells will not be able to directly affect the enemy hero.
- A certain similarity to a skill tree is expected for the Hero, as in Diablo 2.
- The map will have 2 levels, as in all other parts of Heroes.
- And regarding the Academy: Mini-Artifacts can only be given to creatures of this race and are created in the War Forge building in the Academy castle, and only if the Artificier skill is present, which can only be obtained by heroes of this race.
All these details are based only on facts and compiled after a complete reading of the interview with the developers.