Point of fact, there ARE alternate forums. I know of at least three of them right off the top of my head. They have very little activity though, and almost all of what they do have are either carbon copy posts of things available here or module warehousing.
There is a very good reason for this. OpenBOR is NOT Mugen or any other application. The Mugen community essentially amounts to a fan group, because beyond some stalled out clone projects and hollering at Elecbyte, they really have no control what so ever of the topic itself (the Mugen engine). We do, and that makes the OpenBOR community a very different animal. We are a development team with an integrated fandom. This unique combination is what has allowed OpenBOR to gradually progress from being an interesting but extremely limited novelty into what is arguably the most versatile sprite based engine ever conceived. Those two halves drive each other. One without the other goes nowhere.
Why does that matter? Because experienced developers aren't going to support fragmentation. I could get into why - but unless you are an experienced developer, you probably wouldn't really understand. Long and short, they will stay with the "main" community, wherever that may be. This has been proven time and time again.
Every time someone decides they disagree with our policies or that they could run things better, they scamper off and start up a new community on this or that freeboardhere.com, and sure a few people head over and join them. But it doesn't take long for members to realize if they want to get anywhere with their projects, they will need help from the people who know the engine best. Wanna guess who those are?
Because of this (and many other reasons) long ago we discovered through experience that splitting the community across several forums is a liability, not a strength. Until it grows beyond a single forum's capacity to handle things (and we're no where near that), it's best to keep our eggs in one basket. The other way has been tried several times and failed miserably. In fact, at one point even the engine itself had multiple branches. With other applications that might have been a good thing. For a user content driven app like OpenBOR it is and was an utter disaster. Any long time members here remember that mess? The multiple incompatible MYBORs, the Vets vs. Noobs thing, and all that other crap that went with it? Wanna go back to it? I didn't think so. This way works.
Now obviously I can't stop anyone from going off and starting a new community, nor would I. But for those who want to try, know two things: First, you won't have support of the team that builds the very thing you are talking about, and all of your knowledge will be second hand. Second, anyone can start up a forum, but running a successful community is an entirely different thing, and you'll quickly discover it takes much more than being the man in charge. It's an expensive, frustrating, time consuming undertaking (as in years) - and often a thankless one.
Just my two cents.
TL;DR: It won't work, but good luck anyway.
DC