Doubtful. I think they will announce it next year early. This year is already pretty stacked for Nintendo with Mario odyssey, MarioxRabbids, fire emblem warriors, yoshi, Kirby, Pokken, and xenoblade chronicles 2. Next year we're already supposed to get a new fire emblem, Metroid prime 4, and Pokémon, so Smash may fall in there or possibly even 2019. I'm not gonna hold my breath though.