I now have a theme for a storyline-based event. Anyone who remembers the Voyager episode "Year of Hell" will remember the Krenim Timeship. I'm working on a 3-month/3-event or longer storyline, similar to the Wizkids events coming later this year and the 6-month Dominion War event that just finished.
Events would likely come with special, custom terrain tokens as participation prizes, competetive prizes, etc, a participation prize for the final event could likely, for instance, be a large token (not as big as the DS9 one from WK, but large) of the Krenim warhsip itself, for use in casual play.
I will post more details as I continue work; will post an event thread once I nail down more of the details.