Welcome to the forums...wanna play Pazaak?
Don't remember hearing this line but I haven't played K1 in ages.
It also doesn't have to be the True Sith either - I mean look how Palpatine/Sidious started the whole Trade Federation war in the Star Wars Prequels. In that sense, you could say that the war was an excuse for Revan and Malak to go look for the Star Forge; the two possiblities were that Revan/Malak found the Star Forge during/after the war, while the other as inferred to the Dantooine Star Map movie is that they already knew of it, or at least were DS before the war.
This just adds weight to it being the 2nd one.
Also don't forget the K1 loading screen saying the True Sith are long gone. (as discussed in older threads).
Still, does make me think because I was pretty disappointed with how K2 really screwed up the KotOR universe.