I want to talk about something different than how ugly or not ugly the characters are so speculation
Legend Beys:
Divine Valtryek
Basalt Spryzen
Rumble Fafnir
Grave Luinor
New Beys:
Squall Kamai
Eruption Tenshi
Ok time for explanations. Divine would be a good counter to Belial's demonic nature. Basalt means being in lava, and fiery things are Spryzen's motid. Rumble refers to lightning, and Free has moves involving a lightning aura. Grave means dangerous, and Luinor is just that.
Now for new beys. First we have Kamai, which would belong to the white haired kid exploring the hunted house with the pink haired girl in the teaser. He's important enough to be on the key art, indicated he is or will become a blader, so here's is bey. I think a windy type element would work for him, and Kamaitachi use dust devils. Also if you haven't inferred it already, Squall has to do with wind. As for Eruption Tenshi, Eruption is similar to Dynamite, and the ideal owner, to the left of Valt, seems to be the main antagonist, As for Tenshi, they're Heavenly Messengers. An angel is a direct counter to a Demon.