The Walt Disney film, Race to Witch Mountain, was mainly marketed towards young audiences despite it being a reboot of a franchise most of their parents grew up with.
I was probably an outlier in the fact that I was a child familiar with the original. However, a large selling point to the kids unaware of the source material was the cast, specifically that of AnnaSophia Robb and Dwayne Johnson.
By 2009, the release year of Race to Witch Mountain, every elementary schooler already had some sort of obsession with AnnaSophia Robb and/or Dwayne Johnson.
Robb was a lead character in the 2007 gut-wrenching film Bridge to Terabithia, and Johnson had recently starred in his first Walt Disney film, The Game Plan, also released in 2007. Both were highly successful films and ensured that young audiences would have Robb and Johnson fresh on their mind.