McKenna said Charlie Dixon (ankle), Harley Bennell (hamstring) and Jesse Lonergan (hamstring) would also be close to a return against Adelaide, although the Suns were more likely to err on the side of caution with those three.
"We're going to miss Michael Rischitelli for a few weeks," McKenna said.
"We can't replace him as far as experience goes, but certainly that hardness around the ball, Karmichael Hunt, Greg Broughton and Jared Brennan provide that. There's three ready-made replacements there.
"There's been a bit of sliding doors. We haven't been able to get a really consistent group.
"There's no headaches at match committee at the moment, but when Charlie Dixon, Harley Bennell and Jesse Lonergan come back, and all the other players, I reckon in another two or three weeks time, that's when headaches will turn into migraines."
With the Suns established as one of the AFL's feel-good stories of 2013, McKenna sent an early message to his troops not to rest on their 5-7 record, and to chase as many wins as possible.
"Our percentage has improved, our ability to hold up the opposition and for us to score, that's the more positive things and that's given us those wins," he said.
"I don't want to put a number on it because if I say six (wins), we get to six and we stop asking for the seventh, eighth and ninth wins, so it's more about that consistency and our ability to compete.
"We need to finish off the second half of the season better than we've started it and try and achieve that four-quarter performance and if we do, we'll get some more wins, that's for sure."
Michael Whiting covers Gold Coast news for AFL.com.au. Follow him on Twitter: @AFL_mikewhiting