Mega Man Legacy Collection 2 was just leaked by the Korean ratings board. According to the description, it will include Mega Man 7, 8 , 9 and 10, and presumably it will have numerous bonus features like the first collection did.
The original game released on 3DS, Steam, PS4 and Xbox One, but this rating only lists PS4, Xbox One and PC, with Nintendo Switch not included. This is strange as Nintendo platforms would be a perfect match for this collection, and it makes no sense not to bring this to the Switch.