He hasn't done bad enough to get dropped this series, although he's certainly been our least successful frontline batsman. So the selectors may not find it easy to drop him if they wanted to. The negative here is that he may be keeping out a quality youngster which may affect us in the long run. People always assume that if the seniors go away, we will struggle, but look what happened after dropping Sehwag and Gambhir. There’ll always be good players in India. We may not get another Dravid any time soon, but we’ll certainly get enough good players to be in the top-4 among Test teams.
I don't think he will be dropped.
He might decide to step down on his own.
There are 8 months to go before SA and once IPL is over, he will be out of active cricket.
So what will motivate him to get ready for SA?
Plus with so much time before the next series, he might just decide to call it a day in-case he is not ready to wait that long for his next international assignment.