To the surprise of many, Nintendo has renewed the Mario & Luigi brand in South America through the Argentine records office. After the closure of the creators of this series, Alpha Dream, during the past year, the franchise was terminated given the null response from Nintendo.
According to this patent (via Eurogamer
We will have to wait a while, yes, to see what is the final destination of the brand and if its renewal translates into new deliveries for Nintendo Switch or its rumored successor, Nintendo Switch Pro.