I wouldn't worry too much about her being involved with the TV series. If she's head of Scholastic media, she'd have been involved in getting a whole lot of stuff off the ground over the years, and Animorphs '98 was fifteen years ago on a shoestring budget with a young audience in mind.
Not to say I'm confident about this, but "major motion picture" and "Nickelodeon cash-in shot in Canada in 1998 for cheap" are apples and oranges, the same producer doesn't mean too much.
I'd say we shouldn't get too excited, either, like a third of movies that "are searching for writers and directors" never get past that stage, sort of peter out and go into development hell until the studio gives up and moves onto other things. It might happen, yeah, but this alone doesn't mean a whole lot more than a couple of years ago when Katherine & Michael announced "some movie studios have approached us to talk". A thousand factors are going to contribute to whether this actually happens or not, and I have a sneaking suspicion that if it does, given the lack of audience they might just go on the cheap, a sort of teen-fad thing that generally nobody gives a **** about and doesn't make any impact whatsoever. More Percy Jackson than Harry Potter, more The Maze Runner or Divergent than The Hunger Games. The B-level.
It's exciting, but just don't take this as "it's happening". Because it likely still won't. Especially, as someone else said, if the Goosebumps flick doesn't make a dent.