The last I heard was that DLR's re-do was fairly straightforward. The Splash part of Critter Country would be annexed to New Orleans Square, with no theme or chronological concerns. I think Disneyland's pretty easy.
Last fall, I'd heard WDI was still struggling with the chronology problem in WDW, since Frontierland has a definitive end to its timeline, which I think its roughly 1790-1895. That's at least ~25 years before the events in PATF, which is a faily large gap in both time and in the definition of the US "frontier".
The proposals I was aware of last fall included:
- Build the PATF ride with Tiana and alter Frontierland to include 1920's New Orleans
- Build the PATF "prequel" ride without Tiana but with other characters from the film
- Let Tiana take over Pecos Bill's and make it Tiana's Palace
There are pretty clear issues with all three. There might be other alternatives by now.
WDI has shown with GOTG and now Batuu that existing themes, timelines, and canon aren't barriers to putting in any ride in any location. It's possible they take option #1. I think the reason why options 2 and 3 exist is that enough people in WDI saw the problems with #1, that they were looking for a compromise everyone could live with.
I mean, if option #1 is taken, it means Frontierland includes everything in US history from the Lewis & Clark expedition to the end of World War I, the formation of the League of Nations, and almost up to the Great Depression. Everything from canoes to airplane travel, to the earliest helicopters, is fair game. The first half of Tomorrowland's Carousel of Progress would fit into Frontierland's chronology.
I think WDI recognizes the issues with this, hence this is why we've not heard more about it.
If the next Disney update on PATF focuses only on Disneyland, that would be an indication that WDW's Frontierland timeline remains an issue within WDI.