I think both Hasbro and retailers can differentiate the 25th from movie figures. They have dealt with movie toys in the past for various toy lines, as well as Valor vs. Venom, Sigma Six, Mighty Muggs, Hasbro Heroes, etc., and I'm sure they don't assume that they are all the same, or that the sales of one will necessarily have much to do with the sales of another. But beyond this, do stores even decide what they order from Hasbro? Being possibly the largest toy manufacturer out there, I assumed that the Wal-Marts and TRUs of the world sold whatever it was Hasbro made, good and bad, having an influence on store exclusives if anything.
Also, the 25th anniversary figures weren't doing so well recently. They have been peg-warming at my Toys R Us for months now, and have even gone on sale at BBTS. Part of this is collectors losing interest because there is nothing new coming out, but I think the bigger part is a burn out factor. We got just about every major character from 1982-1985, and we got so much so fast that a lot of people were feeling that they were a bit over-saturated.
Personally, I think the "break" could be a good thing for the 25th line. When the movie has come and gone, if they start bringing back the remaining, important characters (not many--mostly the internet 7 packs and more 1986 and Resolute figures), maybe interest will have built back up again.