I'm not too worried about the Next forums, since they're actually pretty circular and insular -- like the people said, if you check the example, there's newer posts from other forums than the first page of Next.
If you ARE worried about Next dominating the discussion, though, you should probably create new threads about your own games. Post about the new Pathfinder supplement, or whatever Goodman Games has put out, or how much better
Hold Person was when it was just "Mass Charm Person" instead of paralysis back in 1974. Be pro-active. The best way to hold onto the things you love is to continue to include them in your life.
I'd even strategically post them just after WotC releases a new playtest.
Lord knows I don't want to look at a forum full of 20 different people all giving their opinion on how whatever minor mechanical change WotC implemented this time around is going to ruin the game forever.
Gimmie some variety in those circumstances!
And us mods will be more sensitive toward edition warriors, general obnoxiousness, and repeat topics because of this. We'll have more eyes on one space, then!