In general with the VS. dioramas, the next release has been announced around the time that the last one is shipping. Wolverine shipped just a few weeks after Sentinel went up for order. Sentinel shipped right before Hulk went up. Each one has taken about six months from preorder to delivery, so I am expecting Hulk VS. Spidey in very late June or early July, with the next diorama being announced around SDCC and put up for sale for everybody. Any diorama announced tomorrow would be an exclusive, and I'm not sure that this line is established enough yet to start putting out pieces that aren't available to the general audience. However, maybe an SDCC exclusive would draw some attention to the line! (As if it needed more after Gray Hulk...)