An interesting idea, and certainly many will be interested in hearing how this goes, and reading the AAR!
For your prospective commanders, there is some key information that would be needed. Largely, I'll call this 'expected time commitment'.
For example, are games live, or asynchronous? Are team members needing to coordinate and join a server at the same time? If so, what time zone is expected? Is the opfor purely megamek bot, or is it you or someone else? The point of all the above questions is that the human coordination factor is one of the biggest items that will cause people to be interested or perhaps interested, but unable to support the time commitment. Someone playing a battle on their own against AI and publishing results is very low barrier. Playing asynchronously isn't much of a time/scheduling barrier (other than it takes awhile calendar wise) but adds in complexities of its own, and some people will only want to play live. While adding live play, especially as the human count gets bigger, gets harder to coordinate.
Looking forward to your link and more information, and smart move on the 49.12 to allow simultaneous play!