how about mini-campaigns?
An idea for the new EN World Gamer could be the idea of mini-campaigns.  It seems, from my reading of other threads, that there is plenty of competition left in the market of published adventures (Dungeon, et al.) and mini-games (Valent Games & FFG Horizons).  The niche that I see is for a product combining the best of those 2 lines in a mini-campaign.  It really wouldn't matter what platform you choose.  I personally prefer D&D, but some may prefer D20M or some other d20 game.  The key would be to provide a few new rules options AND a few adventures.  The scope of it could be as few as, say, 3 modules or as vast as something like the Shackled City Adventure Path.  With a magazine, the camapign could be gradually fleshed-out in a serial fashion.  Maybe the characters start in a town/village and solve a small problem there.  Of course, that leads to a larger problem in the county/countryside/country.  Soon, they are saving the capital/kingdom/world or something else heroic.  As long as it is fun and easy to start and maintain, I think people would buy it and play it.