Well, here's the other way of looking at it. DMs and players who want and already do play Epic Tier are the hardest of hardcore D&Ders. They know how difficult it is to play at that level, how much stuff there is to keep track of, and how grand of a scale things have to be for it to be effective.
At that point... those hardcore D&D players are usually (again, I say usually, not always) ones who create things for themselves. They have grand campaigns, grand storylines, and extremely strong abilities to create, work, and tweak the game as they see fit to pull Epic Tier off. They're the best of the best. As a result, it's these people who are less likely to need epic monsters or epic modules, because they're comfortable just creating what they need, when they need it (and are probably doing this all the time anyway.)
A DMG3 for instructions on "how to run epic tier", or a monster book full of rank 'n file epic monsters, or a series of standalone epic tier modules are all products that your casual D&D player would be more prone to pick up, not your hardcore. But a casual D&Der is less likely to play Epic (even with a DMG3, monster book and modules at their disposal) just because there's much more work to run it for very little additional payoff over Heroic or Paragon Tier. So those people are less likely to buy these kind of products even if they existed. I guess the chicken/egg situation kind of applies here... but in my opinion really doesn't matter much in the long view. Epic Tier is just not important enough for a casual player or DM to their spend money on.
And your hardcore players more often than not already create much of what they need on their own. They don't need "help" per se from WotC. Or more to the point... don't need it often enough that their few purchases would bring in enough money to make it worthwhile for WotC to spend time and money producing them. Sure, the occasional DM might grab an Epic module for a few ideas... but most of them wouldn't run entire Epic Tier games using nothing but official WotC products (which I imagine you'd NEED to have happen to sell enough of these products for WotC to justify creating them in the first place.)
Maybe I'm wrong here... but I do think the circle of potential customers for additional Epic Tier content is smaller than we think.
At that point... those hardcore D&D players are usually (again, I say usually, not always) ones who create things for themselves. They have grand campaigns, grand storylines, and extremely strong abilities to create, work, and tweak the game as they see fit to pull Epic Tier off. They're the best of the best. As a result, it's these people who are less likely to need epic monsters or epic modules, because they're comfortable just creating what they need, when they need it (and are probably doing this all the time anyway.)
A DMG3 for instructions on "how to run epic tier", or a monster book full of rank 'n file epic monsters, or a series of standalone epic tier modules are all products that your casual D&D player would be more prone to pick up, not your hardcore. But a casual D&Der is less likely to play Epic (even with a DMG3, monster book and modules at their disposal) just because there's much more work to run it for very little additional payoff over Heroic or Paragon Tier. So those people are less likely to buy these kind of products even if they existed. I guess the chicken/egg situation kind of applies here... but in my opinion really doesn't matter much in the long view. Epic Tier is just not important enough for a casual player or DM to their spend money on.
And your hardcore players more often than not already create much of what they need on their own. They don't need "help" per se from WotC. Or more to the point... don't need it often enough that their few purchases would bring in enough money to make it worthwhile for WotC to spend time and money producing them. Sure, the occasional DM might grab an Epic module for a few ideas... but most of them wouldn't run entire Epic Tier games using nothing but official WotC products (which I imagine you'd NEED to have happen to sell enough of these products for WotC to justify creating them in the first place.)
Maybe I'm wrong here... but I do think the circle of potential customers for additional Epic Tier content is smaller than we think.