It has been announced that the new Winnipeg team will be called the Jets, as was the previous squad. No announcement has been made that I know of pertaining to the logo and colors, but this gives us a chance to look at the old ones. As always, I copied these logos from Chris Creamer's site.
1972-1974: Classic old school look. Hadn't succumbed to the 70's yet.
1979-1990: Definite 1970's update, but not a bad one. No harm, no foul. I do like the treatment on the word 'Jets'.
1990-1996: Another relatively harmless update. I do not care for the 'Jets' mark in this as much as above. I am not fond of the 'J' laying over the top of the 'N' above it. But what that does is separate out the 'WIN', which is a nice touch. I also like the drop shadows in red on the 'J' and the top of the 'S'. These nice touches are actually better than the effect of the logo in its entirety, I think.