[Nymesys Prime]

if it was me.. I would look over all the suggestions on these pages here. There's a lot of good marketing and business planning strategies given by those of us who actually buy this stuff.
I would like to propose Lines by Quarters meaning that in 4 quarters per year I would produce a 15 figure potential line with a Boss figure/dio available to those who bought all 15 figures.
example
2015
Q1-Xmen -Boss Figure(Danger Room/Cerebro)
Q2-Spiderman-Boss Figure(Spider Slayer)
Q3-Avengers-Boss Figure(Thanos with IG/Stark Tower set)
Q4-Marvel Infinites-Boss Figure(Giant Man/Accurate Helicarrier)

2016
Q1-Ghostrider-Boss Figure(Mephisto)
Q2-Fantastic Four--Boss Figure(Doom Castle)
Q3-XFactor-Boss Figure(Future Sentinel)
Q4-PowerPack-Boss Figure(SmartShip Friday)

if you reward you customers with some of the obscure figures in a set and then pile on a Dio/Boss figure for staying with the plan..it would prove to be successful in the long run.

As it stands right now I am still waiting for a NorthStar to round out the MU line..this sucks