Is that really a smart thing to do though...will there be any release conflict? I hope not. Kimishima wants to hit 30M by next March and a mix of strong 1st and 3rd party software will do the trick, but doing it so close, I have my concerns. But we'll see. Maybe they can work out an effective release schedule. We know Smash and Yoshi, but what else could be coming in the 2nd half that's unannounced? If Animal Crossing and Pokemon are in that lineup it may be overkill, no it will be overkill.
In terms of 3rd party I think we'll get Dragon Ball FighterZ, Fortnite, Call of Duty (whatever form it takes) GTAV, tons of Japanese support, maybe the new Tales of game, etc. I also still think Soul Caliber VI is coming to Switch, this year...maybe? Probably not.
Can't wait for E3 though, I think Nintendo's gonna have one hell of a show.