Yeah, the Prime/Megs two-pack is a resculpt of Prime that's a bit closer to the G1 version, and a tank Megatron that's quite close to an update of the G2 figure (remember, when he couldn't actually be a gun anymore).
Magnus/Skywarp is an exclusive. I think Target, which would make it a US exclusive.
There's also a Devastator, which I thought until reading JT's comments this morning was a new figure. Turns out it's a repaint of some Universe or RID or something-or-other figure.