There are too many moving parts to really know. I do know the Big Ten has always kept Texas within shouting distance and there are substantial reasons to believe they're still on speed dial. The Big Ten has always planned to wind up between 16-20 teams once it made the decision to take Rutgers and Maryland. So from that standpoint, I do not believe they're done for a second and they don't believe the Grant of Rights would stop them from taking someone if they want them badly enough.
They still crave a bigger presence along the coast. I think when all is said and done they'll make another run at some folks from the Big 12 (Texas, Oklahoma and/or Kansas) and another run at some Eastern entities (North Carolina, Virginia and Georgia Tech, Florida State or Connecticut). Notre Dame would still be taken if they see the ACC being invaded and decide to join, but I think the Big Ten has moved beyond actively pursing them. Some people say Missouri is still on the radar but I'm skeptical for several reasons. I do think the Big Ten will absolutely have, at very least, teams 15 & 16 in place before the fall of 2015 (when they go to negotiate their tier-1/2 rights). From what I hear, it's very possible we see some more realignment activity this upcoming spring. That is my guess for when the Big Ten will start rattling trees again. That would allow them to make another run in 2015 if they decide to go out to 18-20.