We have another updated for Angry Birds Transformers with both characters and weapons added to the game in a considerable update all round.
As reported in the iTunes listing for Angry Birds Transformers we have:

NEW CHARACTER! The Blues have arrived as Bluestreak and Prowl! Unlock them via Portal Missions.
ENERGONICONS! Knock down those Piggies even faster with fireballs, lightning storms, and many other unique skills by unlocking over 40+ different Energonicons to take into events.
CRAFTING! Use your hard-earned materials to craft Energonicons in Professor Pigs Crafting Lab.