That is a tough one. As I said, the Jets were able to field lots of DBs, almost never playing their base. They were able to get a good rush from their D-line without blitzing. Though most of their sacks on Brady were coverage sacks, Brady definitely got spooked early on and felt the pressure. From what I saw from the last game, the Texans seemed to play their base package a little too much, given the success of the Patriots run game. Now, with Gronkowski back, I expect Ridley et al. to be even more potent in their rushes. It is a "pick your poison" type of scenario. If I were the DC, despite the improved run game, I still would be most worried about Mr. Tom F. Brady. Limit your base package snaps, and hope your line can stuff the run.
In defending the passing game, the big question in my mind is how effective Gronkowski can be catching the football. He saw some limited action in the Miami game, but was too small of a sample size to go off of. I think he will still be relatively limited, and mostly used for blocking and some decoy passing routes. He will get some catches, definitely, but he won't be Super 2011 Receiving Gronk. For specific schemes: first, take away the most effective NE receiver. Put Johnathan Joseph on Welker. That may seem like a waste, but if Welker runs free the Texans will pay. He must be respected. Try to jam Aaron Hernandez at the line and play him in tight coverage. He has been pretty bad since returning from injury, with tons of drops, and I feel like tight coverage will rattle him a bit and continue his alligator arms and dropped passes. If these options are taken away, expect to see some screens and passes to Woodhead/Vereen out of the backfield. There isn't too much I can say schematic-wise about that, just that the players need to be prepared for this. That leaves Brandon Llloyd. Lloyd could be the difference maker in this game. He is the answer to the flooding of the middle of the field, a la Jets 2010. A few back shoulder throws from Brady to Lloyd will effectively will the DBs to stop bunching the short-middle. Luckily for the Texans, Brady and Lloyd still don't quite have a mind meld of chemistry. Many Brady passes just aren't on the mark, be it Lloyd not running the correct route or Brady over/under throwing. Due to this, you can have your safeties cheat up a bit until Brady/Lloyd show them that they can't.
That is my defensive gameplan as the Texans' DC. If Gronk or Hernandez are 100%, and play to their 2011 forms, it will severely limit the above plan.