No. 100-120M is possible.
Maybe even 150M could be reachable, but Ninty will replace NS with a new and more powerful hybrid before it comes close to that goal: after PS5 and XB Series X launch, quite soon NS specs will become insufficient even for scaled down versions of the biggest games, and while portable games are probably the most important for NS, Ninty doesn't want to lose home games market share. Anyhow, NS won't be killed immediately after NS2 launch, and it will receive new games for many years anyway, so very high numbers are almost sure, but 150M are most probably out of reach.