McKenna, answering questions from fans on the @AFL twitter account, said rugby league convert Hunt had been performing strongly in lower level football after battling injuries last year.
"Karmichael had an interrupted post-Christmasperiod, his form has been good in the NEAFL," McKenna said.
"He's knocking on the door."
Hunt and Bock were two of the Suns' key recruits in the club's first season in 2011.
But injuries last season restricted Bock (broken leg) and Hunt (hamstring and calf) to just two and nine games respectively.
McKenna revealed Bock joined full training on Thursday.
He said the former Crow would need to build match fitness before an expected playing return in the coming weeks.
He said round four remained the return target for Bock.
In other responses to fans, McKenna said the club was aiming to win 12 games this season to earn its first finals berth, and also spoke about his admiration for Gary Ablett jnr.
He said he was disappointed when exciting prospect Jack Martin was struck down with an injury ten minutes into his debut game.
Guy McKenna is here! Tweet a question using #askthecoach now pic.twitter.com/aKUEdZCeI7
— AFL (@AFL) March 20, 2014.@ndedman94 We'd hope Dixon, Lynch and Day as our three tall forwards will all stand up #askthecoach
— AFL (@AFL) March 20, 2014. @brigidmoloney Tiger Shaw has the ability to use the ball so well and break the lines, and his aerobic capacity is enormous. #askthecoach
— AFL (@AFL) March 20, 2014.@leamfarrar After last year, we're attempting to make finals this year. Won 8 last year, history says 12 games gets you in, that's our goal
— AFL (@AFL) March 20, 2014Yes! RT @LauraStap: #askthecoach Does Gary really live up to the hype? Is he really the best player you've experienced? @AFL
— AFL (@AFL) March 20, 2014.@BigFootySUNS Yep. He joined in training yesterday so with match fitness, still looking at another 2-3 weeks, which is really exciting.
— AFL (@AFL) March 20, 2014.@AndyCollinsSP Don't tell anyone, but I do have a soft spot for them! But go Sunnies! #askthecoach
— AFL (@AFL) March 20, 2014.@The_Jet1 Yep, it's rewarding for everyone. The hard work done by all should soon be rewarded. #askthecoach
— AFL (@AFL) March 20, 2014.@captaincaple Yeah, they're getting better I think with the level of coaching guidance through the AIS, the kids are fitter and smarter.
— AFL (@AFL) March 20, 2014.@Crowleysweat No, I'm going to throw a curveball and he'll start on the bench! Just don't tell @GaryAblettJnr #askthecoach
— AFL (@AFL) March 20, 2014.@RoshJock Yep he was very impressive. A shame he didn't play the nab challenge but he's going to be rewarded very soon. #askthecoach
— AFL (@AFL) March 20, 2014.@JRickard1991 He's an elite midfielder because he works both ways so hard, and more goals from a mid is probably his last challenge.
— AFL (@AFL) March 20, 2014. @ShootFlexo More midfield, but if the opposition needs a forward blanketed, Junior is someone we can certainly turn to #askthecoach
— AFL (@AFL) March 20, 2014. @joshrowe Our midfield working hard and our tall timber taking marks and kicking goals late in the game. #askthecoach
— AFL (@AFL) March 20, 2014.@MattNHartley Karmichael had an interrupted post-Christmas period, his form has been good in the NEAFL, he's knocking on the door.
— AFL (@AFL) March 20, 2014.@bombersstorm90 A fit Dixon, Lynch, Day, May and wouldn't be surprised if Tommy Nicholls goes to another level. #askthecoach
— AFL (@AFL) March 20, 2014.@asoufan96 Such a shame. Big build up and to last only 10 minutes into his first game. He's an amazing kid, will be back bigger and faster.
— AFL (@AFL) March 20, 2014
