Similarly to Xbox’s year partnership with Activision’s Call of Duty installments, Tutlerock’s Evolve’s Beta and DLC will be coming to Xbox One first. The extent of the beta’s exclusivity is not yet known – whether it’s full-blown exclusive or just a few days, it’s coming first to Microsoft’s baby.
In addition to this news, a new monster and new characters (seen below) were revealed. Classes are still the same, so this leads me to believe that character customization will be a thing. More as it develops.