Primarily the latter. There are eight 4 day matches between Markram leaving and the t20s starting. That's more than half the season. But we're hoping for it to be a three month contract by all accounts, which ultimately would take us through the bulk of the t20s too.
It's quite possible that Markram will then take back over from Rahane after that (SA are free after the WC until October). Of course in theory they could team up together in t20s, but I'm hearing that Chris Morris could be our t20-only overseas player.
That should, we shouldn't get our hopes up too high. Getting a NOC, and thus agreement, from the BCCI can be notoriously difficult. They really do seem to have a thing against their players playing domestic cricket outside of India. Although they have softened slightly in the last two years.
Very good win today. 350 was probably par on that pitch, with the short boundary. We look better than when we won it last season. But need to sort out our bowling to the tail.