Personally speaking.
I like the idea. I have a few contacts among the HoMM2 players besides those mentioned above; we can try to update them. The question is the location and timing.

I will try to explain the idea in detail.
What is needed is agreement within the group and a specifically defined proposed product. As I understand it, although the HoMM2 community is small, it is quite friendly. The people are adults, fairly balanced and responsible. Most likely, we won't have to expect unexpected ultimatums at the worst possible moment.
And a tournament—say, a Swiss system with 3-4 rounds, or two group tournaments of 4 people each and a final between the group winners—is possible. I repeat, we are talking about an offline tournament. And a mandatory description of the played matches.

Here is the initial package that we would ideally offer. Let's say, gathering the best Warcraft or Starcraft players in the country is possible, but it would cost tens, if not hundreds of times more. And the second Heroes, in terms of legend and branding, are quite on that level.

Why am I not proposing this in the HoMM3 format? Because there is no agreement among the players; just read the threads about the Yekaterinburg tournament project for 10k bucks, or the first club championship. Fights immediately break out over the version (SoD, TE, or BT), personal inter-portal antipathies flare up, etc. In principle, I am sure that I can reach an agreement with all the HoMM2 players—that the game prevails, from a rational standpoint. I don't have enough charisma for the HoMM3 players—the leading players will politely listen to me and then go off to play poker and other entertainments.
IMHO, business people will not continue negotiations in such a case; they need certainty.
Perhaps HoMM3 will mature in the future, but not now.

So—a compact tournament of the best players in the country in a legendary, cult turn-based strategy. Who can we sell this to? I probably wouldn't risk offering it to the men's magazine "Playboy" or the women's "Cosmopolitan." But to a specialized computer gaming magazine—very much so. Especially one that features smart game analytics.

I would probably reach out to a magazine like "Best Computer Games" (LKI). This magazine has quite serious game reviews, including turn-based strategies, especially cult series. There are many articles dedicated to games of the past. The Heroes series holds a special place; for example, it's worth reading http://www.lki.ru/text.php?id=1035

They have a quite interesting column—the Duel Club, where two journalists play a game, usually a strategy, with detailed descriptions of the matches and pictures. For example, here is how they played HoMM2. By the way, one of the players was the current editor-in-chief of the magazine.
http://www.lki.ru/text.php?id=404

In the Duel Club column, there are quite a few detailed descriptions of turn-based strategy games, which are quite interesting.

According to the theme, the second Heroes occupy a rather prestigious position.

Why do I think this might interest them? Well, at least because the magazine is constantly searching for authors—top strategy players. For example, quite a few analytical articles are released for Heroes 5 — http://www.lki.ru/text.php?id=4007

Practical players, some of the best.

There are quite a few articles by one of the strongest players in the first Starcraft, White-Ra
http://www.lki.ru/games.php?Game=SCBroodWar#Masters

I'm not very interested in how much these people's services cost the magazine, but the fact is they are looking for active players who also know how to put their thoughts on paper.

Given that this magazine correctly understands the place of the Heroes series in the gaming industry and is interested in interesting endeavors, we will offer them the project of a tournament for the best HoMM2 players. From us—gathering the best players, at least 8 people, full play-through of the tournament, and writing full reports.
From them—a mandatory report in the magazine, with photos and interviews. The magazine is sold with a disc—so it would be appropriate to place reports and game saves from the championship there.

Since the journalists play themselves, they could also participate and describe the vision of the tournament from the inside.

With the right presentation, it could become, if not the main theme of the issue, then a quite hit block. Pictures of the second Heroes in magazines always turn out bright, cartoonish, and look great.

What could this give us in perspective? Well, to admire our handsome... faces in the magazine. To declare that the Heroes community, including the second one, is very much alive. To give the game a new impulse. Possibly—to become authors; for example, an analytical article by Qwerty would look appropriate on the pages of the magazine.
To give the Heroes community a chance to establish a strategic partnership with the press; I still hope that the period of squabbles will be outgrown even by the third Heroes. And they too will become a marketable mass-media product.

What will it give them? A fresh, unconventional topic for the magazine. The opportunity to patronize such a tournament, the opportunity to name it with their logo. I repeat, gathering the best players of other cult strategies for one tournament would cost a significant amount of cash. Just take the third one—how much would the TE players ask for participation? And the Starcraft players?

If the best players truly act in coordination (Dust, Mike, Qwerty, PreDS, Ketch, etc.), then the proposal will be weighty. True, the guys from Siberia will have to travel far... but that won't be soon, while everything is being agreed upon... And the magazine's editorial office, if they appreciate all the benefits of the enterprise, might help with tickets.

That's all for now.