Huh? When was that established? We've been nowhere near Coruscant so far, and I'm pretty sure that all we've ever heard of it was when Revan wondered why there was a council on Dantooine instead of Coruscant...
At the risk of repeating myself - huh?
Revan, yes. Exile, yes.
But the Exile's companions? I doubt it. In fact, the end of KotOR2 suggests very clearly that the Exile must take Revan's choice and go into the unknown regions alone and leave his/her friends behind. Kreia even says that he/she cannot bring anyone he/she loves IIRC...
Yes, it seems there'll be a new graphics engine from what rumors I've heard too. I don't particularly need one (getting the plot right and actually finishing the game has much higher priority for me), but I scarcely mind a new engine.
As for who will be the main character, I think it should be both Revan, the Exile and a new character. You should begin as the new character and then meet the Exile and finally Revan alone the way, and they should all be active members in the group at all times, or else the game should split the protagonists into groups with each of the main characters in each of three groups, and each group then take their turn to play their part in the plot like the Freedon Nadd temple vs. Onderon civil war split in KotOR2.
<{POST_SNAPBACK}>
It was once mentioned by Kreia at the beginning of the game, that the academy on Coruscant is also... hmm maybe not destroyed but certainly abandoned.