It seems to me that Icerlot, Crokenburg and Sirox (who are all generals) have been revealed first by the French site Maxitoys.fr who have put online the LEGO descriptions of several 2015 sets. The same site where I have found Skylor, Chop'rai, Kapau'rai etc

Amazon.co.uk seems to have put online the descriptions too later.

But you know how this thing turn usually: LEGO say to them that it's too early and ask them to delete.

The 2 links (in Google Cache):

• http://webcache.googleusercontent.com/search?q=cache:Kuxt-dqAj1EJ:www.maxitoys.fr/la-tribu-ours-des-glaces.html+&cd=5&hl=fr&ct=clnk&gl=fr&lr=lang_en%7Clang_fr&client=firefox-a
• http://webcache.googleusercontent.com/search?q=cache:DiRWJw-IHrsJ:www.amazon.co.uk/Chima-LEGO-70230-Bear-Tribe/dp/B00NGJNXQK+&cd=1&hl=fr&ct=clnk&gl=fr&lr=lang_en%7Clang_fr&client=firefox-a

The names Icerlot, Crokenburg and Sirox are good, and it was indeed the real LEGO descriptions who were in the pages. I don't think that "General" in useful in the title pages, as we don't have "King Crominus" or "King Lagravis".