With fuel prices on the low end of the scale and SUV sales increasing, I'm betting that Lincoln wishes that the Aviator was out right out now. It's an important piece to Lincoln's future sales growth that's absolutely missing from their lineup.
Consider that the Ford Explorer has already sold 95,000 vehicles through May 2016 compared to 89,000 in the same period in 2015. . .a nice 6.6% sales increase. Not sure how this would correlate to how an upcoming Lincoln Aviator would sell, however, Lincoln is missing out on this boom. Looking at how well the new Lincoln MKX is doing with the redesign separating its looks from the Edge and it makes it an interesting discussion.