The tentacle creature from the first dream... there's a possibility you might see more of it in the future...!
As for missing scouts in the jungle, there's implications and hints... like the plant pods that are already sealed, or the water vine gameover scene...
The black thong itself we probably won't reuse. Cursed clothing, on the other hand... ;)
I don't want to give too many details or spoil things. But hopefully this will at least let you know we're considering all these things.