Cut and Paste
Take assorted scripts (The Champ, Rocky, Transformers) then cut and paste until a reasonably coherent, box ticking result emerges - standard algorithms may be applied. And yes, every story/film can be deconstructed in this way but Real Steel is a particularly obvious example.
However, and I'm a little embarrassed to admit this, it's watchable. I guess a lot is down to the personal charisma of the cast and effective fight scenes and perhaps lowered expectations - but I found it OK, actually enjoyable at times.