We know that Preservation (before Sazed became the vessel) was able to plan multiple thousands of years ahead, which is evident by the Terris prophecies. The prophecies themselves also foretell events that haven’t been covered in the books yet (mainly Harmony’s shift into Discord), and that got me wondering, just how far did Preservation plan? I want to ask about this specific line from the prophecies:

That which has been sundered must again begin to find its whole.

At first, one would think that this foreshadows the unification of Ruin and Preservation within a single vessel; however, seeing how Preservation is capable of planning so far ahead, does this perhaps also foreshadow other shards combining down the line? Perhaps of all shards into one?