The thing is, if all of these arena plans come to fruition, will the relocation of a current NHL franchise be nessesary? think about it just have another era of expansion. if there is anything the nhl needs after a season off is not the loss of a current fanbase, but the introduction, or in Kansas City and Hartford's case, the re-introduction of a new fanbase? more teams = more revenue streams.
And, in addition, if there are 16 teams per confrence instead of the present 15, it would usher in a whole new concepts for the playoffs; i.e. preliminary rounds like in the 70's and 80's, and simply a tighter rase and more rivalries which will arise when teams are competing for the final playoff spots when the season winds down.
No Relocation, Expansion, ladies and gentlemen, is the way to go. You may now throw stones at me. Or pucks, whichever is appropriate