According to an article I read they will not let Cronk go.
"It's understood that the Storm have to shed one of their four marquee players, valued about $500,000 each, and four top-end players, who are on contracts of about $250,000.
Even though Inglis is regarded as one of the game's best players, it's understood the Storm are leaning towards releasing him instead of fullback Billy Slater or hooker Cameron Smith, while halfback Cooper Cronk is regarded as the key to the side's success. The latter three form the spine of the Melbourne attack.
Given the comparatively modest contracts of forwards Adam Blair and Sika Manu, it's believed they will be retained, along with former Bulldogs prop Sione Kite and lock Todd Lowrie.
With rising stars such as Matt Duffie, Gareth Widdop, Kevin Proctor, Dane Nielsen, Luke Kelly, William Isa and Jesse Bromwich, Melbourne officials are confident the big five can be replaced - should they be forced out - and the club can stay in premiership contention and, more importantly, under the cap."