We will do a ladder reset at our own discresion and when we consider appropiate, as usual. No need for this topic. If we took all of our decisions based on community polls, we wouldn't be able to fullfill our long term goals for the project.
That said, there will be at least one more non-sigma ladder. As close as the alpha is to completion, it would be really dumb to throw it out there and expect thousands of people to play it online with no issues. We will run a private sigma ladder simultanely with the next ladder, to make sure everything works. Also I would like to execute a few marketing plans before a release as well, such as a trailer and other goodies, so it explodes by the time of release. So most likely you can expect to play sigma in 4 or 7 months.