Can someone say when minato biju mode is releasing?

i know it's too early but i have to know because i will save coupons if he come's soon or i will spend it and save later when he's coming

but it's not yet released in events and shops

Guys can anyone say when is minato biju mode releasing?

I know it's too early to ask but i want to know when he will be released so that i will decide whether to save coupons or spend it

Thanks !!!!!