Besides the inflated economy prices there is no difference between a "legacy" server and a "normal" server, so i highly doubt there will be any new legacy servers.

Also the Legacy servers are/were originally meant to be a place holder for v1 characters, till people are able to move off them and into the normal servers, but seeing as SE opened up character creation on them I suspect they will simply remove the legacy tag from them, as all the legacy tag is good for is to tag to let people know where there are v1 players which is particularly useful if you are trying to find an old friend again but again thats about all the legacy tag is useful for atm.