If Tobias is talking about the possibility of more copies of Sapphire, then I expect to soon receive an email about a new collectible set including Sapphire, Mad Stalker and Strider, all with exciting new packaging, along side yet another 300 copies of that collectible coin of which only 100 copies will ever be made.
Within a couple weeks of release, the extra limited edition "Arcade Coinop Cabinet" set, consisting of the same games in a cheap plastic arcade cabinet-shaped plastic container with a pack of "Arcade" brand cigarettes and "Arcade" chewing gum will have several listings on eBay starting at $999.99 minimum bid.
Madou Monogatari would be the best candidate after Sapphire, but people have mentioned him saying that he only wants to cater to English speakers who can't handle "moon runes".