It's a serious deal.
Don't get me wrong. I adore the characters that have officially allied with Iron Man in Civil War (and let's be real, I love Tony Stark too). And while I know that the Russos are working really hard to make sure that the film depicts a conflict with no clear answer... I just can't turn against team Cap. Personally I think that the idea of a superhuman registration act is naive; even if the power it gave those in charge wasn't abused, it wouldn't solve many of the problems that super-humans have been causing in the Marvel universe.
There's Team Cap ^^^
Not pictured are Wanda and Ant-Man, though they're with him as well.
And there's Team Stark ^^^
Of course a bunch of my favorite characters are there- Black Widow is one of my all-time favorites and I'm so excited for Black Panther's film debut. Dear all of you: Please don't die.