Well Sherman's March only provides us with one big battle, the Battle of Bentonville, and that is not much for a standalone title.
So it could be a worthy idea to add more of the Southern department, if the actions throughout the war along the east coast(Georgia, Carolina's, maybe even Florida's Battle of Olustee) are added it would surely be big enough.
If battles like Battle of Fort Fisher or Fort Pulaski are added we could have, after Petersburg, another different "taste" of scenarios because such fort battles with a large naval component and a very direct approach are very different from what most if not all CW titles provided us till now.
Sure those might not interest all, but I guess same counts for the Petersburg scenarios too, and other more "normal" titles like a Valley campaign title would only provide is with more "normal" battles. Something different from time to time is just what keeps a series alive.
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Lieutenant General Christian Hecht
Commander I Corps, Army of the Potomac
"Where to stop? I don't know. At Hell, I expect."