Well, I didn't say he was coming right now. I just said he was coming soon.
I'd rather Malak come first because that would open more possibilities for Darth Revan's event, such as having us use Malak to fight Revan in the the third or fourth tier, then Malak tortures Bastila in a cutscene or something. Then the last tier could be Malak against a more beefed up Revan, and every couple of turns, or when he falls below a certain threshold of health, Malak gets healed and some start boosts from those Jedi pods.
But I don't think CG would miss the opportunity to make more money off of a journey for Revan requiring the new OR characters.