Are the other SG toys ones that could not work in other lines and, if so, how are they?No, I'm pretty sure Flamewar was released in SG because there was no other way to budget that extensive a deco in any other line. She's a deluxe with a Battlemaster accessory, but only $7 USD cheaper than SG Slicer, who comes with a whole extra deluxe figure!
Whatever SG figures Hasbro releases, it's going to boil down to the decos someone there wants to see produced but can't work in to other lines.