We've actually heard the rumor of Plants Vs. Zombies: Battle for Neighborville coming to the Switch already. The original info game from GamesBeat's Jeff Grubb, who listed the game among other rumored titles. All the other games Grubb mentioned have either released on Switch or are confirmed to be on the way. The only one left is Plants Vs. Zombies: Battle for Neighborville, and it looks like we finally have something near a confirmation on that.
GameFly has a knack for listing Switch games before they're announced, and their info always ends up being spot-on. Their latest listing is for Plants Vs. Zombies: Battle for Neighborville "Complete Edition," which they say is coming March 19th, 2021. If that's the case, we should be hearing an official announcement from EA any day now.