Surprise, surprise...it seems that Activision has plans for another Skylanders title. Take a look at the domains that Activision has secured.

http://whois.domaintools.com/skylandersgiants.com
http://whois.domaintools.com/skylandersgiants.dk
http://whois.domaintools.com/skylandersgiants.it
http://whois.domaintools.com/skylandersgiants.net
http://whois.domaintools.com/skylandersgiantsgame.com
http://whois.domaintools.com/skylandersgiantsgame.net
http://whois.domaintools.com/theskylandersgiants.com
http://whois.domaintools.com/theskylandersgiants.net
http://whois.domaintools.com/skylandersgiants.fr

I'd expect this lot of domain purchases to relate to a Skylanders Giants game, due out sometime late this year.