The 3-D IMAX version is incredible; but I have no interest in seeing some inferior anaglyph (red/blue or red/cyan) conversion.
However, since Warner is apparently testing the waters by releasing IMAX's SPACE STATION on DVD with flat and an anaglyph 3-D conversion in the same package, it may also happen with NASCAR.
Just don't expect it to look a thing like the polarized IMAX 3-D version does in theatres. I wish they'd include a field sequential 3-D version also, as at least that would allow full color images and better depth. The anaglyph stuff is full of ghosting, blurred images and distorted colors.
See the NASCAR film as intended while you have the chance!