Board Thread:Suggestions Forum/@comment-25969775-20150215210020/@comment-25947183-20150216200947

MERP does conflict with maps but you could just condense the nations so they fit so you could add in things from MERP maybe but none of the landmasses that are part of Middle-earth and are different to the current map(the MERP maps don't stay true to Tolkien's works and the current map is true to Tolkien) should be not added. Nations and cities could be compressed into Tolkien's cannon world to fit in with Tolkien. So you could ask for seas and bays to be added in as long as they don't change the map from cannon to non-cannon. Islands should be ok.

So the main conflicting issue with non-cannon and cannon is the land but the everything else is easier to make exclusions for. It is should be ok to add new continents but nothing really that changes the shape of Middle-earth.