Meh, idk how many people would buy old cod games on the switch. If you are a cod fan, most likely, you have already played them and if you aren't, I doubt it being on the switch will change that. Specially since there are yearly releases of cod which would probably be exclusive to ps4/x1/pc. I'd rather have them remaster it but either ways, activation would probably price it at full price compared to like the discounted prices on every other platform.
What I am saying is, port something else.
PC Specs: CPU: 7800X3D || GPU: Strix 4090 || RAM: 32GB DDR5 6000 || Main SSD: WD 2TB SN850