Sakura, I’m sure you already know, is cherry blossom, and maccha is special powdered green tea.
And I hate to be cynical, but seeing as Nestlé Japan are, I’ll play too.
There’s such a thing as over-egging the cake. Gilding the lily. Mashing two national treasures together for no reason other than to shift product.
And what you get when you put them both together is neither. It certainly tastes of both, but why? Like opera and freefall skydiving – you may love each individually, but I can’t think of a single reason to force them together.