I'm pretty sure there's nothing definitive on Zadina yet. Wings play their last preseason game tonight and Zadina is playing, final decisions will be made after tonight.
And regardless it's not a sprint. Kotka played pro last season so it would be reasonable that he would be able to transition fast.
You’re right it’s not a sprint but think about this. Kotkaniemi turned 18 in June and Zadina will turn 19 in November, there’s pretty much a year difference between the two players and the younger one looks much better and plays the more important position.