There already is 2 lines
There have been in the past. The men's line first moved back in 2008-09, so there were two lines until the WBB committee moved its arc back to match in 2011-12. Since, there's only been one marked on the court.
There already is 2 lines
What are the odds of the NBA moving their line farther out? In the playoffs, it seems like guys are making shots all the time from way beyond the current NBA line.