The first wave of three figures - Starscream, Optimus, Bumblebee - have shown up here in a lot of stores, and it looks like another wave of three are coming... but don't get too excite.

The three figures in wave 2 are -
Megatron - minor recolour of the green tank Megatron
Grimlock - minor recolour of the Walmart/BigW exclusive Grimlock, which is Beast Hunters Rippersnapper.
Strafe - major recolour of Beast Hunters Windrazor.