I’ve now played through all the Hero missions again, bar three (I think) and got all of the Power Bricks and Minikit bits in them all. Pretty much, anyway.
I’m still to work through the rest of the Villain missions though, and I’ve also got 200 achievement points yet to unlock too. I think I’ll get most of them all at the same time, though, once I’ve 100%ed the game. Currently I’m at around 85% done!