There's an interview up with Shogun at MMA You:
MMAyou.com: If you fight Chuck Liddell, how will you beat him?
Rua: I want to fight him for sure, if possible in 2008. Let's see, his game on stand is very aggressive and dangerous, you must be very well prepared to beat him. Unfortunately I can't say how, maybe he will read this (laughs!).
MMAyou.com: Do you know when you are fighting again?
Rua: Probably September, I hope so.
The timing seems right for this fight to happen, but I don't know if we'll get to see it. I suspect Chuck will fight the Jardine/Silva winner, with the winner of that fighting Quinton. Frankly, I'd rather see the winner of Silva/Jardine fight Quinton in the fall, and the winner of Shogun/Chuck fight for the title early next year.