I want that show too, but am holding off for now. All the other pre-sales were on this website well in advance of the start date for the pre-sale...but not this one. I am also a little suspicious, since this show was already rescheduled once.
Also, I saw the same thing you did on Ticketmaster:
The Velvet Revolver website does not say anything about who they are performing with at various shows.
Now the Alice website says nothing about the Irvine show being a solid tour date.
I was going to try to buy some tickets thru a broker, but I'd be really pissed if it was a VR-only show. I had heard that at least one of the other shows, the crowd rocked to AIC and started leaving as soon as VR started to play!