The expansion plot is here, assuming that's the furthest north they intend to go with it. Prior expansion plans for this land back in the late 90s and early 2000s included a new walkway that went between POTC and Jungle Cruise-
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However, it's likely that the parade itself would be halted temporarily at some point during construction due to the crossing roads needing to be reworked. It needs to go through Caribbean Way to get back to Main Street. And that road would end up being impacted in some way. Unless they build some sort of temporary bypass.