Red Dead Redemption 2 is only announced for PS4 and Xbox One right now. It sounds like the chances of a Nintendo Switch port are very slim.
GamingBolt interviewed Wedbush Securities analyst Michael Pachter and they asked him if there was any chance of Red Dead Redemption 2 heading to the new console.
He replied with: “I would say the chances of that are exceedingly poor. I can’t remember any game other than – there was a GTA made for the DS, which came out in 2009 – I’d be really surprised if they wasted their effort to port anything for Nintendo. I just think that Nintendo has wandered too far away from the mainstream for most of the publishers, so you’re just not getting mainstream games produced for Nintendo consoles- not ones made for other consoles, at any rate”
There are rumors that the Nintendo Switch only has 4GB of RAM and game cartidges only go up to 16GB. If this is true, a huge game like Red Dead might not be able to be on the Nintendo console.