Darth Maul's run is ALREADY done which is the problem. And more are beng made. How much money did they put into his development and promotion only to have a small number of sales and a heap of returns with damaged sabers. I won't even getting into the HORROR that is the Indy LSF.
I know they have had LSFs that were successfull, like Iron Man, but if Wolverine is NOT selling well for them I could see the line either slowing right down or stopping completely. The LSF market is not as large as the PF one, and if people are getting tapped out or annoyed... Well the market dwindles and poof goes the sales.