rotate at 15degrees with spd above vref In the window
Please don't rotate to 15degrees, you will hit the tail.
Of course you can go around after touchdown prior to reverser deployment, its simple, all you do is advance the thrust, you don't need max (dependent on runway length I suppose) and call "go around flap 15". PM retracts to flap 15 and you rotate normally very soon thereafter as you pass your Vapp. Job done.