I don't know if the cover is public yet, but we saw it on a slide. Had a goliath looking guy with a huge axe and a female elf with two ghostly panthers she seemed to be summoning/controlling. Barbarian and shaman perhaps.
I don't anticipate it will be as evenly distributed like that. I mean, we got the PHB with three strikers and one controller.Stuff

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.