I would say that in this case they would not be able to run the baseline because the ball had already been inbounded. I will however tend to be lenient as far as where the ball was on a timeout if the coach is trying to call timeout after a made basket. That is if A scores and B wants a timeout I will be more likely to say they still had the ball out of bounds when the coach requested the timeout.

In your case though you say A2 calls the timeout after the ball was inbounded, in this case we definetely have a spot throwing after the timeout.