New figs hinted at in instruction book. True or false?

I read somewhere that if you looked closely at the pics of the bot in your instruction book you may be able to tell by different head sculpt and/or other differences weather, or not that figure was slated for the "changed head, changed paintjob= new figure" treatment. I recall reading that thunder wing was one of those figs (although I saw no difference in the way he looked vs his pic in the instructions) and now he dose infact have a repaint coming out with a new head sculpt. Im speaking ofcourse about sky shadow.
So, is this a coincidence, or is the whole instruction book hinting at new figures thing a fact? If it is true, then which figures have been hinted at that we have not yet seen new figures of yet?
Any speculation, or official confermation on which figures the hinted at figures will become?
Thanx all,
Scott.
So, is this a coincidence, or is the whole instruction book hinting at new figures thing a fact? If it is true, then which figures have been hinted at that we have not yet seen new figures of yet?
Any speculation, or official confermation on which figures the hinted at figures will become?
Thanx all,
Scott.