Today, a new list of answers from Nival Interactive to fan questions regarding the future of Heroes 5 has been released. Very good news is that the second patch will be more focused on Multiplayer and will include new maps for it.
After the release of the second patch, the developers plan to regularly upload new maps without being tied to patches. And in the third patch for Heroes 5, we can expect a map editor. It was even mentioned that there would be a campaign editor as well. The third patch should be released in the second half of July.