This Frozen "initiative" (why with quotes?) sounds about right to me in scope, as long as the temporary quick hit things do not turn into permanent things, like MIckey's Birthdayland. I agree with
@sshindel that it isn't clear yet that Frozen will have staying power. So putting in a big-budget ride/show/land seems premature be about 10 years. On the other hand, the popularity currently is clear, even if
@sshindel's daughter and her parents are sick of it. So put together some things that are entertaining, capitalize on the current zeitgeist (did I use that word right?), but don't require a big capital investment or, importantly, tie up real estate for a long period of time. A sing-along in an existing theater, a feature in a parade, an elaborate meet n greet, a new segment in Philharmagic (if it happens), a Frozen store with light theming, even a stage show (not a full production like Aladdin, but more like BaTB) in an existing venue. Sounds like the right kind of investment. If, in a couple years, Disney finds that removing those "temporary" things is not a good idea because the popularity of Frozen remains, then it will be time to plan for the bigger investment -- permanent presence.
What I worry about is the location of this temporary, cheap stuff. It doesn't belong in Epcot, I don't think. As I've said before, I only think Frozen could belong in Norway as an example of local myths/legends/folk tales (if it is a good example of that, and I'm not sure it is). That kind of information can do a lot to enhance the understanding of a culture. I'd love it if the WS countries had little exhibits, shows, walk-throughs of popular tales/stories, and most of them could work with Disney tie-ins. Mary Poppins or Winnie the Pooh in the UK. Mulan in China. Three Cabelleros (already there) in Mexico. Hunchback of Notre Dame in France, etc. But these should generally be sideline attractions in the pavilions, not the headliner.
But Frozen into MK (preference) or DHS (especially as a replacement for BaTB or in the Sounds Dangerous theater) and I'll be happy, so long as what's meant to be temporary is temporary (2-3 years).