I would like to know how to have my item in any bundle envato planning to have.
I believe Envato contacts you directly if they wish to include one of your items.
Yep, if Envato wants your file in a bundle they are planning, they’ll send you an email and ask if you want to participate in the bundle. There’s no way to contact Envato and say you want to be in the bundle.
Every now and then you can apply for things like “free file of the month” and such if they are in shortage.