Star Saber being a Leader Class toy in a Generations line isn't
just fans clamoring for a fan-favorite but simply pattern recognition. The Leader price point is for two things which sometimes overlap: characters which are meant to be big and chunky (or who require the price point, like Six Shot) and for faction leaders/major figures. As it is, Star Saber
was at one point an Autobot Leader even if it was just in an anime that never made it to the US.
No the reason why Star Saber seem so inevitable is the precedent laid out by Overlord: a Leader class almost 1:1 remake of a big, pricy Japanese-exclusive figure and character released as a mass retail Leader-class figure. Outside of some places in Europe, Overlord had
never been released in the west at mass retail and yet Titans Return saw him get the biggest price point at mass retail because, let's face it, Overlord would not have worked at anything smaller.
This is why I think Star Saber has to happen some day: there aren't a lot of Autobots left for the Leader price point unless Hasbro decide to fill every single line with Optimus/Magnus/Rodimus/Jetfire every single time. Right now we are down to only two big (big as in size and chunk)

Leaders: Star Saber and Thunderclash, both of which could easily be pretooled into a more marketable character to save cost.
I mean there's Dai Atlas, but it seem like Takara has this one covered this time around with Legends EX.