While five isn't a huge number, the quality of these maps is more than enough to make up for it. Here are all the returning maps in Mario Party Superstars.
Mario Party Superstars, Page 2
All Boards (Maps) - Mario Party Superstars Guide - IGN
Mario Party Superstars: Board Ranking
Mario Party Superstars announced for Nintendo Switch, coming in October - Polygon
Mario Party™ Superstars for the Nintendo Switch™ — Official Site
Mario Party 3/Superstars Woody Woods in Minecraft.
Mario Party Superstars DLC: Uncover the Full Party Potential - Cheat Code Central
Mario Party Superstars - Nintendo Switch, Nintendo Switch
Mario Party Superstars: Guide To Every Item