As previously discussed there are no targeted Hyperion flybys. However, there are some pretty close nontargeted flybys:
HYPERION 2010-332T03:31:35 Nov28 Sun Inbound 71598.9 km flyby, v = 4.9 km/s, phase = 73 deg
HYPERION 2011-237T17:50:51 Aug25 Thu Outbound 48781.7 km flyby, v = 5.2 km/s, phase = 106 deg
HYPERION 2011-259T13:22:45 Sep16 Fri Outbound 57347.5 km flyby, v = 4.8 km/s, phase = 84 deg
HYPERION 2012-068T01:21:42 Mar08 Thu Inbound 93452.2 km flyby, v = 5.5 km/s, phase = 148 deg
HYPERION 2015-151T13:42:21 May31 Sun Outbound 35456.9 km flyby, v = 4.3 km/s, phase = 71 deg
The last flyby in particular is at much closer range than any of the flybys so far with the exception of the targeted flyby.
In addition there are several flybys of Mimas at significantly closer range than the closest flyby (~61,000 km) of the primary mission. There are also many nontargeted flybys of Tethys including two flybys closer than 10,000 km. The W/NW part of Odysseus isn't particularly well imaged, hopefully this 'gap' gets filled.
There are many nice flybys of Rhea. There isn't very good stereo coverage near 0° longitude. Hopefully that relatively small 'gap' gets filled - I want a high resolution DEM of Rhea's *entire* surface
Lots of nontargeted Dione flybys as well and many flybys of the small 'rocks'.
I'm a bit surprised there are no Voyager class (~100,000 km) Iapetus flybys since there was a ~120,000 km flyby early in the mssion and that one was by luck/accident and not planned. It happened when the first few months of Cassini's trajectory were altered in response to problems with the Cassini - Huygens communcations.
This is going to be a very interesting extension to the mission provided everything goes well.