Easy.

Summon the strongest Iron Fists from history and dump them in the modern Marvel universe. A lot of their simpler moralities would easily make them see the US and Superheros as the real enemies and set some cool fights between Danny and the time displaced Iron Fists, and the (Bendis) Defenders. Not to mention the other hidden cities would love to poach an Iron Fist.

And interweave flashbacks to the time displaced Iron Fist's lives a bit like how Immortal did.

The most interesting thing about the Iron Fist now is the history of it not repeatedly blowing up and restoring K'un L'un or the Dragon.