They won't come back, but the JK Hub has achieved more in its short existence than the other sites have achieved since the dawn of JK. Think about it, we're comparing classic re-skins done with wordpad to total conversions done in 3DSM... It's like JA's quality graphics, on JK's quality engine. Not to mention that every editor is more proficient with COG.
I do miss the old times, though. Never again will there be another game like JK, so as long as there is someone to compete with, I'll play it, mods or not.
I didn't like JO/JA, but I haven't seen enough mods to see if anything makes it almost as fast paced or strategic as JK. It's not even Quake with Lightsabers like the advertisements claimed, it's too slow.
Don't get me wrong, if you're the kind of person who says "Wow, did you see the graphics on that game? I've just gotta get that!" then JA, not JK, is for you.
Obi-wan? I remember hearing about that game. Nobody really talks about it anymore, though.