Good to find out now! When i got my ticket it said T3, I guess i have to forget about the Business class checkin(SkyTeam Gold) and the access to the Delta lounge(Using Amex Plat) since there is no such thing in T4.

I habe a Priority Pass card for some lounge in T4 but i think it is located landside and my traveler companions won't be allowed unless they pay a fee.