NimoStar announced work on a new mod for Heroes IV. As he's almost having a monopoly at 'all in one mods' (now, after Equilibris team slowed down) for Heroes IV he got quite a lot of attention :D

Lo and behold, work on "Ultimate Mod for Heroes IV" begun. Nothing is confirmed and set in stone at this stage. You can watch or talk to him at HC here.

What to expect in UM?

• Full HD and widescreen support: Incorporation of the HD Wrapper, with edited fullscreen remastered menues and altered, brilliant buttons.
• Contrast-enhanced, color-corrected: A darker, more moody Heroes IV experience, fully reconfigurable from the menues.
• Relive campaigns like never before: Remastered campaigns with better ambience, added secrets, enabled previously unfinished events, story and features.
• Rediscover creatures: Thanks to the creature plugin, all creatures have abilities overhauled, with up to four abilities each. Discover the blocking Nagas, reevaluate tier 1 creatures such as double-hacking dwarves, and ambush your enemies in the woods with Stealth elves!
• Completely stable: Reliance on modern DLL methods and not hex hacking of the executable permits much less crashes. Enjoy hours of uninterrupted gameplay and worry not about your actions!
• No false positives: Unlike Equilibris 3.55 hacks, this doesn't trigger antiviruses warnings. Play with the security of knowing nothing fishy is going on.
• Incorporated objects: All map objects in the pack and both Equlibris versions have been added and are load-compatible. In addition, several completely new objects have been added just for this mod.
• Improved terrain: Fractal landscaping allows hybrid terrains for more lush and interesting sights, both in adventure and combat maps.
• Re-slotted Artifacts: Accumulate up to four tomes or scrolls in your Misc slots while you still hold Shields in your hand, upgrade your health to 200% with the Rigs of Health... but you can no longer obsolete Scouting by buying four spyglasses. After all, you can only look into one at a time ; ).
• Improved heroes: Now all hero classes come with a third skill! Use wisely the Diplomacy of Nobles, encourage the daily Summoning of your Druids, shine with the Leadership of Knights, or immediately raise hordes of undead with your actual Necromancers...
• New and Rebalanced Spells: Turned every cast-enabable pseudo-spell into a learnable spell. Rebalanced schools and gave more variety. Applied unused magic bonuses to corresponding ones. You think Banish is useless? Not any more! You can also now Freeze your opponents in Order, or obliterate your enemies with Nature lightning.
• Conserved lineups: No creature has been level-altered, town-switched, removed or substitued. Reuse the factions you know and love from default Heroes 4, with all the same levels, monsters, and classic choices; now revamped with all the new features.

Special thanks: Karmakeld, mirage, and radmutant for making object pack, Iliveinabox for his tool which helped mass-packing, RoseKavalier for creature ability plugin, verokster for HD wrapper.

-- Expected release date is around mid of 2021. --

What to say? It's nice when the community works together. This can become the best mod for Heroes IV, including many other mods and work incorporated in this one.

If you don't know NimoStar, he's author of Greatest Mod for Heroes IV, which also got a lot of a praise previously.  See ModDB or HC.