The odds for the Goldberg/Lesnar match have changed and now Goldberg is a massive odds on favourite to win. So despite only being back for one match they are giving him the huge win. I personally would of given the win to a full timer to help with a big push
Not sure on the logic of nearly 47 year old babyface non wrestler Shane McMahon being part of the important interbrand match. Especially with Cena, Ziggler or even Taker being at Smackdowns's disposal.