We've already had an official reveal of four LEGO Super Mario sets for this year's summer wave but a few more are still coming on 1st August. This includes 71422 which, thanks to the LEGO Building instructions page, is entitled Picnic at Mario's House Expansion Set. The LEGO Super Mario expansion set which isn't tied to any subtheme like the Donkey Kong sets will retail for $34.99 with 259 pieces.
That's a fairly high price for just over 250 pieces so we expect the set to not be very substantial and instead include another section of Mario's house in LEGO form. Along with this, it is confirmed that another Yellow Yoshi will appear in this set which has only so far appeared in 30509 Yellow Yoshi's Fruit Tree. The rest of the set will include the usual course-building elements along with a small picnic build that includes fruits and cookies.
Set Information
Set Name - Picnic at Mario's House Expansion Set
Set Number - 71422
Ages - 6+
Piece Count - 259
Price - $34.99
Release Date - 1st August 2023