They wouldn't call Matthew Sinclair up and not play him, same with Ingram. Both the radio commentators at the ND game reckon they'll go with six batsmen and four bowlers, so Patel and most likely Brent Arnel will miss out.
I was just going by the article on the NZ cricket website:
Selector, Mark Greatbatch, said Sinclair has been brought into the squad as cover for the top order batsmen; ?We felt we needed a cover top-order batter, rather than cover for our middle order, so Neil is a little unlucky in that respect.?
Greatbatch confirmed that Daniel Vettori will bat at six; ?He has been very successful there over the last half-dozen tests. It also gives a very good balance to our side. It enables us to play the five bowlers we are looking for, whether that is four seamers and one spinner, or three seamers and two spinners in our squad, we have the ability to be flexible.