Hogan is not on the bubble and neither is Mitchell. Not even close.
I would say its highly unlikely that Hogan isn't on the roster. But given that he could very well end up the #4 receiver, on a team with 2 quality pass catching TEs and multiple pass catching RBs, it isn't totally inconceivable he gets cut/traded.
See for example both Meriweather and Sanders getting dumped in 2011.