Yes or not buttons in Indesign

Hi Sharon,
not with InDesign. But with Acrobat Pro or Acrobat Pro DC perhaps.
However this will imply some JavaScript for Acrobat.

"Next page" will be no actual page in the document, but maybe a "layer" turned on that is turned off at default.

You may ask in or search the Acrobat JavaScript forum by the term "OCG":

JavaScript

Technically a PDF layer consists of single objects organized in OCGs one can access by JavaScript.

If you have a PDF with OCG tagged objects ("that would assign the object to something like an "layer") in Acrobat Pro and open the JavaScript Console you could access all the layers with:

this.getOCGs();

York Simon at hilfdirselbst.ch used the Preflight functionality of Acrobat Pro to convert a PDF with layers to PDF/X-4.
That could hide all the layer information in the Layers panel of Acrobat so that a user has no direct access to the layers. I could confirm this by using Acrobat Pro 9. The layers are still there and the associated objects can be made hidden or visible by controlling the OCGs.

It may be not much, but see this thread in German for some details:

PDF-Formular, Ebenen schützen - PDF Grundlagen/Web/eForms - HilfDirSelbst.ch - Forum

Regards,
Uwe

I doubt that’s possible in PDF. What is the full purpose of this document?