I just increased contrast on the images above a bit so they look more like their real counterparts. That's what you get when you process photos early in the morning.
The Bloodbowl teams by and large correspond to Warhammer counterparts.
There are 24 official Bloodbowl teams by now, and then some experimental teams that can be played with your opponents conscent.
Chaos (classic roster consisting of Warriors, Beastmen and a Minotaur as big guy)
Chaos Dwarves (haven't seen them in WHFB after 4th edition)
Chaos Pact (mainly a Marauder team)
Goblins (have their own team in Bloodbowl although you can take Goblins in an Ork team as well)
Halflings (also gone from WHFB AFAIK)
Necromantic (Undead with a flavor)
Norse (Norsca were a Warhammer army at some point as well, not to be mistaken with Kislev)
Nurgle (Chaos in yet another flavor)
Ogres (have their own team, however they do not team up with Gnoblars but with Snotlings)
Slann (Apart from the Slann mage priest no current WHFB army for them either)
Undead (Vanilla Undead pretty much based on Vampire Counts fluff)
Underworld (an unholy alliance between Goblins and Skaven)
And then there are some experimental teams
All of these were represented in WHFB at some point. It's just that Games Workshop is very good at ignoring complete miniature ranges they once produced because they do not release rules for them in a current version of their mainstay games. (Same goes for WH40k btw. Demiurg, Squats, Jokaero just to name a few)
With the Norse I would have 15 of the teams listed above. Still a lot of painting to do