Tiana and Louis are both in a "T-pose" position, which is the default state of 3D character models when they haven't been assigned any other poses or animation yet. It doesn't indicate that they're going to be spinning. Here are some other examples from Ratatouille's models for instance-
A few words about working on Ratatouille. The approach taken on this film really required a collaborative environment. All the characters you see here I worked on, but as it was a collective effort...
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If this was supposed to convey the final quantity and placement of the figures, then one has to wonder why they didn't just show all four of those figures on the platform simultaneously. All four of them may well end up there in the final version. But my point is that these renders were still in a very incomplete state when they were screenshotted. They cannot be used as evidence that this is the quantity of figures that will be present in the final version.
To me, it makes little sense for them to build this new physical restaurant facade with so many obvious platforms that look specifically designed to hold animatronics, only to leave them empty. Otherwise they could have done something much more flat and simplistic and leave most/all of those platforms out. Like the very different Tiana's Palace from the film (and also what they based the Disneyland restaurant off).
For the record, I'm not even arguing they'll reuse any of Splash's figures specifically for this scene. But there are still a number of other characters from just the original film that you would think would be likely to appear in the finale. Naveen's parents and Big Daddy LaBouff were specifically mentioned in statements to be a part of the ride. I could also possibly see Mama Odie being present as well. There's also the other new musical critters as well as Tiana's employees that were created for this ride and the D+ series.
If I hear something to indicate that we are indeed only getting a very small quantity of AA's for this scene, I will share it and readily join in on the negativity. I haven't heard anything either way, just that the ride as a whole is supposed to have quite a lot of AA's. And the scarce pieces of art they've released thus far has lent credence towards that claim being accurate. I have my doubts at the moment that the finale of all scenes would have such an absurdly tiny amount (that would likely be fewer than two of the other earlier scenes they've shown art of). Especially with the clearly primitive state in which these renders were taken in, as well as the copious amount of empty platforms they've constructed that look like they're supposed to have characters present.