Having the same director/producer involved doesn't matter, since the copyrights are still owned by two different studios/conglomerates, CBS and Disney/Lucasfilm. The only way such a thing would be remotely possible would be if Disney swallowed up CBS too.
And it's a given that it's not desirable. Who wants the whole SF media universe to be homogeneous? It's good to have diverse, separate properties that offer their own distinct approaches.