I just did this and i have to recommend you be very careful how you upgrade your powers. i finished the game became a hero on hard, and found all the blast shards only to find i didnt have enough EXP to upgrade all my hero powers. and i couldnt farm enemies because i had cleared all the zones of enemies, making spawns very rare and spase. so throughout the game i upgraded all my powers evenly thinking that there would be more than enough points when i finished the game only to find out there inst. so i think you should focus on upgrading whats left of the hero powers.
so i had to play through a 3rd time to get the hero upgrades trophy.
other than that, getting all the stunts isnt too hard, there are oppertunites late in the game to get the 3in1 shockwave roof thing if you miss it at the beginning. but the killing 25 enemies while on a train is also a bit annoying if you miss it on the first island, but still doable.
