EA Access subscription has its perks and benefits, not only for gamers, but for developers too. As it seems, other developers may be a little interested in getting their games listed in the subscription, and it's not totally impossible. EA CEO Andrew Wilson mentioned during the Q&A session of the last investor day that publishers have approached them to list their titles in the subscription (via Dual Shockers). He said:
“Right now we are getting knocks on the door on a very regular basis from other publishers who want to be in EA Access and Origin Access because they see the value of being part of that player network.”
At the moment, Wilson didn't confirm if any game from any other publisher will be listed, but to be honest, it's quite possible and may turn out to be equally beneficial for EA as well as the publishers. We'll update you if anything of this sort happens, stay tuned to WinBeta.