My set is on the way also. As for variants, depending on the set you ordered there may be some in there. There could be a pack of rookie variations in there, though those usually come in a cello pack separate inside the box. There is also rumor that Topps released 3 variations for certain rookies indepedent of just mentions. However, those are in addition to the regular set.
However, it is a correct statement that previously released variations (those from the packs) will not be in the factory set.
My sins have come to face me, I can feel it
That I have lived my life in vain
And now I know I'll reap the seeds I've sown