This brief post ties into one I had a while back. I have no particular desire to get more dice, though the tin is very snazzy. My initial reaction was, wow, the Great Green Face from Tomb of Horrors is a marketing icon all its own. You can literally put that demon face on any merchandise now and it will sell. There is also a minis, video games and boardgame (with green face standees) tied in to Tomb. Wizards knows how to maximize its properties. Less is more.
Wizards is also getting good at crowd-sourcing ideas. In the same announcement, Wizards asked readers "what other D&D related products you'd love to see themed for future campaigns?" Mind you they aren't asking for what theme you want (anything Greyhawk, duh!). They got that planned years in advance I'm sure. No, they want to know what "merch" you'll most likely buy after tins, minis and boardgames. Ideas posted on Twitter include sensible things like dice bags, leather journals, mugs, DM screens, tokens, dice towers, phone cases and plushies - to cool, crazy ideas like dice jails, chia pets, d20 spin-rings and even a sacrificial dagger. Personally, I think a great green face toilet seat would be fun.