Quoted from Rarehero:Never. Franchise pins represent the franchise as a whole...that's what gives them longevity. They don't need to do a "sequel" game.
I know I'm splitting hairs here but Stern owns all these titles of the SAME franchise.
Data East: Batman
Sega: Batman Forever
Stern: Batman
Also, see Playboy. But I do agree with your point, you aren't likely to see 3 different Avengers (or any) pin with the Stern logo on it.
-Wes