The whole score is on the internet already. Seek and ye shall find.
The Autobots theme comes back in "Forest Battle". Jablonsky uses more electronics than on the first, and it sounds amazing. Great choirs. Much darker than the previous score. And The Fallen sounds are genuinely scary."Matrix Of Leadership" sounds a little bit like Gladiator. The end of this track features the "Arrival To Earth" theme.
Good to know "Arival" and "Autobots" are back...