Word started making the rounds on social media lately that Rihanna had joined the Black Panther II cast, but this has been debunked.
Until proven otherwise, we can reasonably assume Bana is also not participating in Black Panther 2.
It turns out this claim originated from some Google misinformation, because if you had typed Black Panther 2 into the search engine, she was listed alongside familiar names like Letitia Wright, Lupita Nyong’o and Winston Duke.
As of this writing, Rihanna is no longer among that lineup, although currently listed next to Angela Bassett is Eric Bana, who played The Hulk back in the pre-MCU days.