They invested in TNG 2nd. The remastered TOS first, then TNG. TNG was already a time consuming and expensive project, DS9 and Voyager would have been much more expensive, and take much longer. So they released new DVD's of the two shows, and went on to create the Enterprise Blu-Rays. It has nothing to do with the quality, or your opinion on the show, or if the show was bland or not. It might not even be possible to remaster Voyager.The whole point here is whether Janeway and by extension VGR deserve a monument, which (unless it’s more of a $25,000 in-joke) implies major cultural, historical and critical significance as opposed to the fact that some people can watch it in the context of The X-Files and fail to see it for what it is, seven seasons of a bland spinoff that never left the turn of the century and can’t be an easy sell to future generations. Perhaps in the final calculation not even TNG was worth an HD master, but CBS did invest in TNG first because of its relative status in the public eye, and now they’re making PIC first with no suggestion of a Janeway show.
Mulgrew's Janeway is fairly iconic. The actress and character got a great deal of publicity when the show was on air, and everyone knows who she is, Trekkie or not