EXCLUSIVE

NeNe Leakes' streak on "The Real Housewives of Atlanta" is finally coming to an end ... at least based on what's NOT been going on during season 9 tapings.

TMZ has learned they've been shooting for weeks now, and NeNe is nowhere in sight.

It seemed like she was possibly coming back to the main cast after being named a guest last season. She's been busy with a HSN clothing line, one woman tour, new game show and a stint on "Fashion Police."

Our 'RHOA' sources tell us producers have added at least one new cast member, and NeNe -- the only remaining OG ATL housewife -- doesn't look to be part of plans going forward.

We're told "guest appearances" are always a possibility, but as of now producers aren't counting on having NeNe.