Apart from Dev blog info, which is now confirming, that original Wizards are returning and Heroes not (in video there are different ones). Same will come for spells and units but not all has been yet introduced. So for example, I haven't a chance to spot "Stage Beetle" or "Dragon Turtle". So, it will be indeed classic MoM in new coat (Just a note that you can play already MoM: Caster of Magic in "old" coat).
Game si currently dwelling in Early Access and you can freely wishlist it at Steam or just follow, to keep in touch.
Master of Magic was however pretty complicated game. Not only terrain, units, AI also diplomacy and exploring the dungeons. In some approaches was similar to WoG, which came about decades later. You can check and compare it with the info from here.
MoM Intro video
Mila Undro (Writer & Lead Quest Designer) speaks about the game:
Slitherine presentation - revealing the game:
Remake FAQ from the MuHa Discord, taken from reddit
Q: Is this a remake of the original Master of Magic?
A: Mostly, yes. Our goal is to have the same amount of content that Master of Magic had, although there will be a few changes. The biggest so far is of course the switch from squares to hexes, which we think allows for more dynamic and interesting gameplay.
Q: Is Seravy involved in the project?
A: Not officially, although we have played Caster of Magic extensively and we talked with Seravy, exchanging views on what made Master of Magic great.
Q: Did you include any of the changes of Caster of Magic?
A: Some of the design choices are inspired by Caster of Magic.
Q: Will this be faithful to the original MoM and be a proper Master of Magic game?
A: We spent a lot of time on the original MoM. It is a great game, and we know it has many fans who grew up with the game and have waited so long for a modern version of it. We’ll do our best not to disappoint any of the fans of MoM.
Q: I would like to interview the team / I would like to write a review / preview?
Q: When it will enter beta?
A: Sometimes in the second half of 2021
Q: When will it release?
A: Sometimes in 2022
Q: Will it have multiplayer?
A: It is not planned for the moment
Q: Can I sign up for beta?
A: Not yet, we will keep you informed if such an option becomes available.
We will see, the game set up pretty high standard, MuHa games won't have it easy!
What do you think about it? Do you like it or now? Did you play MoM?