I know that the "Timelines" figures are specifically explained as always being Optimus/Megatron/Bumblebee/Starscream, but I'd be disappointed (and a bit surprised) if we didn't get the standard repaints of HoS Starscream.
iirc they mentioned that if the molds do well, they'll likely do more/recolors. I think this is there way of seeing what other themes might be popular.