Solitary/WMG

VAL's voice (or one of them) is...

 * Todd Newton. Why else would he be selected to host the reunion shows? He has absoultely nothing to do with the series itself. Or does he?
 * Andrew Golder and Lincoln Hiatt. It is their show, after all.
 * J.D. Roth. He's served as host for Golder and Hiatt's less successful show Unan1mous. Only makes sense that he take the helm of this one.

VAL is GLaDOS

 * 'nuff said.
 * Alternatively she is a prototype from the past that was dug up and modified.