Wonderous Pack of Greatness is the only pack that can get you legendary items.

Long "Story" Short its RNG, you can get a legendary item and the next one would be in 47 packs, and you can get a legendary item and the next one would be in 4 packs. So heres an example of what happened to me:

aftermath coins 2,168,767 1st LI Face of Delight, it was in rux btw.

aftermath coins 1,993,767 4 packs later 2nd LI Pop Smarts!

aftermath coins 1,923,767 2 packs later 3rd LI Commando Corn. Party Corn is still the best corn, Commando is 2nd best.

aftermath coins 908,767 29 packs later 4th LI Bling Shark. 29 fucking packs for a hat and not a LCP (Legendary Character Piece)

after math coins 593,767 9 packs later 5th LI Boom Box.

after math coins 24 17 packs later 6th LI Nothing, No LI.

So Most of Them were hats except for 1