Not being a Kiwi, but I quite like one of the Highlanders wings. Thinks be used to play 7s, Osbourne is it?
I think Patrick Osborne may be available for the All Blacks, he was called into an ABs camp once in 2013, even though he was selected for Fiji sevens, but didn't play. To be honest, I think he's still down the peaking order for AB selection, as he's a specialist winger (they probably want versatility). The other Highlanders wing that's having a great season, is Waisake Naholo - he's played for NZ Seven's but probably won't feature for the ABs, as he's signed with Clermont.
As far as bolters go, maybe the Hurricanes fullback Nehe Milner-skudder is in great form, but, once again, the way forward is blocked with the established guys, so maybe next year?
Could maybe put Blues utility Lolagi Visinia, and winger Tavita Li, as well as chiefs fly half/fullback Damian McKenzie as players to watch as well.
Openside Flanker could be an interesting position to watch post RWC. Sam Cane is pretty much established to take over from Richie McCaw, but i'm anticipating that they'll be a tussle for the back up between Matt Todd, and Ardie Savea, who's come on leaps and bounds this year.