I certainly don't expect this but it is possible that either Cracknell or Jones comes into camp and really impresses. Both play C and both play the prototypical 4th liner stye.
I also expect that there will be a few interesting waiver wire options once teams start trimming their fat.
Calgary for example have Jooris, Shore, Grant, Byron and Granlund all vying the 4th line spot. Obviously some of those guys might play wing but some will have to go through waivers.