Nah, they won't manage to get at Calvin & Hobbes.
Family Circus, probably, but the only reason that they got away with, say, those nasty Calvin peeing stickers is because Watterson apparently didn't wanna go through the (rather extensive) trouble of tracking down the companies to sue them. Nobody could make a movie without his consent (wasn't he working on one, actually, or was that Breathed?), and he wouldn't give it. 'Sides which, C&H isn't very heavily branded- it wouldn't rake in the bills like the Seuss name does.
I mean, hell, look at it. The Grinch at least was only tangentially related to the actual book, and had next to nothing but the fact that it was an adaptation of a Seuss book going for it (except "zaniness" or some other term for what would appeal to a ten-year-old on a massive sugar high), and it made a disgusting amount of money.