http://www.gamesas.com/topic/1394261-werebears-and-spears-maybe-next-dlc/
An example by Littlewing on how werebears and werewolves can be balanced.
As for werewolves, they would be more like light armored assassins and would basically have the same health and attack they do now with the perk tree. But by adding sneak, it would complement for them for having no defence and there would be a 5x multiplier for assassinations. So as a werewolf, you could enter a fort kill most bandits by sneaking and if you're caught you could either summon spectral werewolves and use them for distraction as you creep back into the darkness or you could join the spectral werewolves and use your speed to kill the bandits.
Here's some pictures of how werebears could look like.
http://www.dealspwn.com/writer/wordpress/wp-content/uploads/2012/02/skyrim-werebear-540x208.png(from the Gamejam)
http://tamriel-rebuilt.org/forum/files/werebear_110.png(Concept art for Tamriel Rebuilt)
http://media.pcgamer.com/files/2011/02/Guild-Wars-2-Norn-were-bear.jpg(Guild wars)
http://fc03.deviantart.net/fs27/f/2008/184/2/0/Diablo_2_gif_Werebear_by_W6nd6r6r.gif(Diablo 2)
http://www-images.theonering.org/torwp/wp-content/uploads/2010/11/beorn.jpg(Beorn from The Hobbit)
http://25.media.tumblr.com/tumblr_m4xiw8a0DZ1ru50yro1_400.jpg(More Beorn)
http://heirsofdurin.files.wordpress.com/2012/07/beorn.pngBeorn from The Hobbit: Unexpected Journey Part 1)
As for spears I'd like Iron to Daedric with Artifacts too like Hircine's http://www.uesp.net/wiki/Bloodmoon:Spear_of_the_Hunter from Bloodmoon included.