Sure, silly premise but Rocky and Stallone have heart - tons of it. We get to see Rocky like never before, aging, with unfinished business and trying to move on, having gone through hardship but undefeated by life, still trying and doing his best. Definitely underrated.
A subtle commentary on a career and a franchise that can't be overlooked. Underrated for a flawed premise to begin with, this film would work as a stand-alone even, a man walking alone through memories and brain damage. Brilliant and Stallones best direction in my opinion.