This conversation has been merged. Please reference the main conversation: Lightroom: Support Common Image Formats (EPS, GIF, PDF, BMP etc.)
As long as no third party developer fills that gap, LR needs an extra conversion workflow by using third party applications, which is not very handy.
JPEG2000 may be not be this popular among photographers, but it is used in many institutions like museums etc, as it is known to have some huge advantages for archiving big data pools in an effective and error correction friendly way.
For the interested, some scientific insights about the advantages of JPEG2000 can be found here: