Well, yeah -- of course Saints Row IV has a Season Pass. And, as expected, it'll include access to Enter the Dominatrix, which is now being described as "a tongue-in-cheek version of what this content was originally going to be like." There's some potential there, I think. The $9.99 pass also throws in another mission pack due out in late 2013 and the infamous "Rectifier" anal probe weapon that the Australian Classification Board wasn't too fond of.
Even though I've enjoyed every installment in the series so far and will likely dig Saints Row IV, I don't know. The pass is said to cover content worth "more than $15," but at the same time, I'm not convinced I'll even want all of this post-release DLC. I suppose that's always the dilemma.