The line up today will feature some extremely expensive prototypes, some actually very rare. The Super Scope prototype display was apprently just that, a prototype but I am sure I have seen this before on actual display. Could have been a variation though I wont go on the record and say it is in fact a prototype.
As for the Blockbuster World Video Game Championship 2 Cart, it’s a reproduction:
“This auction is for the EXACT pictured gaming item, guaranteed to work and professionally cleaned and tested. Collector’s #6 of a VERY limited edition. This is a new creation from 2010 of BeaglePuss and MrMark, and works on all three versions of the classic Sega Genesis hardware. Superior craftsmanship, the insert is full color, the label is professional and the case and cart plastic are actual original Sega manufacture.”
Again not sure if this was prototype display but I’ll leave it up to you to decide. Still looks great!