Free forums are a bad alternative, they suck and lack any kind of features.
The problem with AC alleg specific forums is they may be more inclined to moderate the fuck out of people they dont like.
If I were to do it, I would make sure to put some people who are well known and liked in the community who don't have particularly insane personality swings in moderator positions, I'd probably make Aeres, Kewt, Leather and Mass moderators as they are 4 people I can think of immediately that pretty much everyone respects and are intelligent and not prone to being retarded.
Anyways, that's just my take on it, you already know I've offered people to use my forums and despite how badly I troll people here, I really don't take ANY of this shit seriously and never have. lol.
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AC - D3 - GW2 - PS2
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http://ac.wikkii.net/