[BanjoPL]

I again analized Grabbed By The Ghoulies board and i have idea:
Those 4 eggs and ice key under pictures looks like SNS result in B-T...
2 smaller eggs would be pink and blue eggs in B-T...
2 bigger eggs would be certain eggs from B-K...
Maybe Rare put 4 false eggs in B-K and only 2 correct? This explain why Banjo speak only after 2 eggs collected...
In Banjo-Tooie i can found refrences to 2 eggs from B-K:
TTC pictures near Blackeye releate to TTC map in RBB plus egg is in captain's'cabin-red egg
Loggo-green egg

Now pictures on board...those door possibly looks like doors in Workers Quaters in Grunty Industress in B-T...Loggo is there!-green egg
Those land with X looks like SFI...in RBB there is map with X where SFI is...this releate to Blackeye and pictures near him...there is egg in his cabin-red egg

Maybe we should collect ice key and certain 2 eggs and activate secret level(in B-K)?
Bottles Puzzle Game have something to this...
Maybe Rare show us 2 fake eggs in B-K ending movie,hide 2 fake eggs and hide 2 correct eggs? Maybe thats why they said:"Wait untill Banjo-Tooie" Why not? They put 4 false eggs and only 2 correct...And this explain why we can't found green and red eggs in B-T...
Maybe eggs will reveal those prizes in B-T:
red egg-Bottles'Revenge mode
green egg-open door in Quagmire-RSA1

This is only speculation guys...