I have been getting League Pass for years (cable) and live in Florida. The way League pass has worked in the past is if games are broadcast as local home games on local channels, they are blacked out on League Pass. I think that means if you are in the area that receives the Boston Comcast sports programming, you will NOT get the Celtics on League Pass. If you are out of the Boston Comcast area, you will get the Celtics games, but may or may not receive the Boston announcers. They always show the home team announcers, but sometimes have two League Pass stations showing the game, so that you can see Tommy and Mike on one if it is an away game for Boston. I hope this is clear enough...;-) It seems to me that there might have been a game last year that was not broadcast...not sure, though...it might have been knocked off by weather or something...
League Pass usually starts in preseason with a brief "free" period, "sometimes" including one or two regular season games, then you have to order it for the regular season games.
There is a brief period when you can order League Pass at a discount....Last year it was $180 for the season...the year before that $160 for the season. I am hoping they don't raise the rates again this year.
I do love League Pass, and often catch other teams when the Celts are not on.