Nintendo announced their plans for an expanded version of the Nintendo Switch Online service during their September Nintendo Direct. A new membership plan was announced which included the addition of Nintendo 64 SEGA Genesis classic games.
Posting about the news on the official Nintendo website, the company included several screenshots of confirmed games for the Switch. It includes games such as Contra, Castlevania, Sonic and Eco the Dolphin.
In addition to this, there’s also a SEGA Genesis controller and Nintendo 64 controller launching for the Nintendo Switch too. Nintendo posted to Twitter (https://twitter.com/NintendoAmerica/status/1441169774222798856?s=20) to announce there will be more news coming in the future.
There are no exact release dates yet but we know the SEGA Mega Drive games will be coming with the Nintendo Switch Online membership plan expansion pack in October.