I see benefits and possible drawbacks to most topics.
There are also some interesting new suggestions by Wildfire, though "colours" would require then 12+1 colours - which is manageable, of course, but there would then be different tones (wavelength/hue, saturation, luminance) of basic colours.
"Clothes swap" could be funny. I wonder how far the calendar was strict canon or still-canon-related. How much freedom is there? We all might have added custom random elves for crowded scenes, so that would already not be 100% canon, but even WaRP uses "extras"/"supernumerary actors" (whatever the correct English term is).
"Pivotal moments" sound interesting, but we'd have to assume that something happened behind the curtains, that was not (yet) shown. But then, one has to be careful with the sheer amount of EQ publications, as there is chance that something was actually explained somewhere else.
Sentimental items would likely also offer a good amount of possibiities, from Troll with their gold and alcoholic beverage or tools, to Cutter's NewMoon, a pentdant,...
Only crossovers seem a bit too off-canon for me (obviously). Of course, there'd be a broad range of possibilities.
So far I am quite undecided.
But I'll have to see how I get in traction this year, anyway.
