The cards from the Secret Lair Smitten Superdrop appear to be missing, including the Foil Versions of Jumpstart Lands. Here are the card IDs from the box that I've opened so far:
The Unfathomable Crushing Brutality of Basic Land
SLD 239 Plains
SLD 240 Island
SLD 241 Swamp
SLD 242 Mountain
SLD 243 Forest
Bonus card:
SLD 563 Swamp (same picture as JMP 061 in foil)
@ic0n67: The foil quality of the cards that I received is excellent, I can't detect even the slightest curl in any of them. I'm really impressed, tbh.