50 Shades of Grey has been a bit of a hit, which can only mean one thing: mashups.
Yes, they're everywhere at the moment, and this latest one imagines what it would be like if Batman and Iron Man were hopelessly in love, and possibly had a sex dungeon of some description. Thankfully, very little of that latter element is shown, and this is more about fleeting glances and giving each other 'the eyes'.
It's not totally outside the realms of possibility either, given that they're both billionaires who spent their money on making cool suits for them to fight crime in, so they'd at least have something in common to talk about.
For some reason also Thor appears at the end which seems to kind of come out of nowhere, but hey, we suspended our disbelief a while back.