According to this topic http://forum.warmane.com/showthread.php?t=331701
"Q: We are waiting anxiously for the old raids from TBC, WOLTK etc. What is the progress on that?
A: We're currently testing out ported functionality and raids on Cataclysm, depending on how it goes there, we can probably a high influx of content to MoP."
So what is the status ? Can we expect that content to MoP anytime soon?
