The Weather Channel will want to be in the basic package
MLB Network, NBA TV, NHL Network will want to be in the same package as Big Ten Network, CBS Sports Network.
Yes, the Weather Channel would want to be in a basic package. And back when they were a part of NBCUniversal, a company that owns lots of important networks, that would have happened. But since last year, TWC is solely owned by Byron Allen's Entertainment Studios, whose only other TV channel is something called Justice Central, which Uverse TV currently carries as part of their Family tier (and for which it appears AT&T pays nothing to carry the channel because it is 100% ad-supported). So in other words, TWC has basically no negotiating leverage. If Byron Allen is willing to give it away for free and just make money on ads, then sure, I could see AT&T TV including TWC in every package they offer. But if he actually wants carriage payment for it, then nah, AT&T TV will restrict it to an add-on Extra pack (or *maybe* the Max tier) in order to keep costs down for subscribers.
And while MLB Network, NBA TV and NHL Network might want to be in the Max package along with the RSNs, Big Ten Network and CBS Sports Network, they also don't have a lot of negotiating power since they're not part of large network groups (unlike Big Ten Network -- owned by Fox -- or CBS Sports Network). All three of those channels are already sold by Sling TV as part of their Sports Extra Pack. I expect AT&T TV to do the same.