I'm sorry for your loss.

Also appears in this image, apparently taken from the announcement. However, Big already has his yellow eyes by this time (albeit more orange).

Given that the E3 build is dated only a few weeks after the announcement, my best guess is that this and the brief footage come from March or early April.

BETA BIG, IS THAT YOU?
(Sonic Gems Collection trailer)

then hold either Up/Left and press A, and the skill setting will change to the phrase Boy Love. "Boylove" is a term used by pedophiles in 90s to state their attraction towards young boys, so why it made it into an OFFICIAL NES GAME is beyond me.

I theorize that this may have been an early cover that somehow got accidentally released, as SpongeBob evidently just uses some edited stock art.