The way I see it, is more of a miniseries, that adapts the contents of Hamilton, the musical, to expand that of the two acts. But with the expansion, they'd integrate opportunities for dialogue and more natural scenes without the flow of a musical number.
And for songs added, it can range to some of the cut songs (let it go, and Cabinet Meeting 3 come to mind really quick). Along with new songs written by Lin directly, to have it stand out from the Broadway show in both live form, and in the pre-recorded forms.
So I guess, you could say that I'd propose both in their own ways fused together.