Hill will be next, count it!
It's pretty obvious that they are sure that Ziggy can field punts, I dont think the Niners care about his return capabilities. I see him as being the "sure thing" in terms of catching the punt, and just faircatching it all the time. Sing knows he has ball security with him.
Unless Hill has a great game I dont see him displacing Ziggy.
Also on a side note, Im really rooting for Jurovich to make the PS, I think he's got the athleticism to make it, and Im biased since he played at my HS, unfortch I never played with him as he was a freshman the year after I graduated.