I think you misunderstood. Allow me to clarify...
They'll bundle some "earpods" which will be beats branded, but you will be able to purchase additional beats wireless headphones or an adaptor for existing 3.5mm headphones.
A bit like they offered the standard headphones and offered the in-ear ones as an additional purchase.
They won't be beats branded in an iPhone box.
I'm sticking with my iPhone 5S as it does everything I want and I like the smaller form factor. If I needed to change the phone I would get the 5SE.
cool story bro.