Al Jazeera news channel is the original channel, but they are branching off. They have now sports, children, and english news channels. Anyways the news channel is independant of the others. You can recieve Al-Jazeera News Channel practically anywhere in the world, which is not the case with the sport channels.
There are 4 sport channels, 2 free to air, and 2 need subscriptions. The latter covers Serie A and La Liga. They had problems last year with broadcasting live matches last year because the overwhelming number of "important" matches in both leagues compared to only 2 channels, so I doubt they will cover Juve matches live OR they will use the free to air channels for juve.
In any case the subscription for the encrypted channels are $25 per year (yes its per year).