I think that if they recast the first three doctors for the TV anniversary, Big finish would probably find it apt to use them too. And seeing as the first doctor has already been recast for the DOCu-drama (geddit?) I think it's a possibility.
"The universe has to move forward. Pain and loss, they define us as much as happiness or love. Whether it's a world, or a relationship...everything has its time. And everything ends."-Elizabeth Sladen: RIP.