Dear Lego, I really think it would be prudent to consider expanding your demographic and filling in overlapping niches with product lines sure to sell very well. Some of these I may have mentioned before, but it never hurts to repeat them
We know Lego city is full of cops, firefighters, medics, and construction workers... we get it. But what about its citizens, and its other business professions??? How about musicians?
Bridge the gender gap and release a pop culture line starting with music artists (fictional). Each set could contain 4 to 6 figures and accompanying instruments (microphone, a grip-able guitar (maybe with a 1x3 plate fretboard that can be swapped out??), a keyboard (brick built?, a brick built drum set. Here are _SOME_ things that could be included in each of the sets:
A. Hip Hop/Rap Set. A minifigure torso with a giant medallion (flava flav/mr t). One Blue, one yellow, and one magenta windbreaker jumpsuit torso with black shirt printing and white double-stripe accents (black for the yellow one (kill bill, anyone?)). A few brown heads might be nice (some gold teeth in a nice grin for one, sunglasses for another??). Throw in a black overalls top perhaps. Dreadlocks hair piece. Female face with hoop earrings.
B. 60's Rock: Silver peace medallion torso. The long hair piece (harry potter mermaid/exo force), but in dark tan? Tie-dye shirt!!! Perhaps an afro. Mutton chop head. Rose colored glasses female head (janis joplin?) Torso with vest and ascot, and an afro hair piece (hendrix??).
C. Punk & Metal: Black minifig head with white facepaint design (with light blue accents). Two mohawks, one green, one black. Brown arms on a white torso with suspenders and some kind of logo. Black torso with red anarchy logo and yellow arms. Could recycle some extreme faces here. Dark Red Hermoine hair for female rock diva of some kind. Skeleton face. A top hat. Frilly tuxedo pattern (can't think of which two colors would be best)??
D. Country/Folk. Nuff said.
E. Fringe/Electronic: Headphone 'hair' piece? Devo flower pot (lol). Dark purple female hair normal. Etc...
The well is running dry at this point, but I'm sure there's enough substance here to run with. Just need to bundle 'similar' music themes together and let people mix and match what they want their band to be like.
Then release a stage set with bouncers and a few fans, maybe a contemporary singer figure. Your customers will come back and buy the stage after they get the separate band set they want.