I'm fairly confident that collections will only impact TA1s. In fact, you're probably better off locking in now in case on of the AL east teams adds a 2500 stub common that you now need to buy to finish that team on Friday.
My best guess for the TA2, if there is a collection it will be the 42s from TA1 for that division. If there is more than 1, they may also include the legends/flashbacks from TA1 as well.