I would say no. Twilight Princess was in a similar situation, and it didn't reach that. The Switch is not going to be as huge as the Wii, so I'd expect less.
Your right, TP is in the similar situation no doubt so comparison is correct thinking. That said TP was off by 1.5mil, which is alot sure but still close.
Switch doesnt need to be as high as wii. It could still do 50mil and reach 10mil combined with LoZ wiiu. Look at the high sales some games got on wiiu despite a 15mil userbase.
That said BotW is tracking ahead of TP and ibwouldnt be surprised if it is already close to 4mil by end of its first month (shipped+digital)