Doubtful you'll get more than a scattered product or two for the SL era. They just spent an entire year on the Star League not that long back. And they're going to want to move forward, as the evolving storyline seems to be what sells. This is the first time in what, a decade, decade and a half that BT has actually had an unknown future. That's too good not to continue moving forward. Sure, they'll offer other era support, but on limited basis. Looking backwards isn't the future of this game. If they want to grow the game, it has to move forward. That includes the rules, though I'm not as confident that part will happen.