I love Coldplay, or at least some of their music, I guess. It's really love or hate. They put out two brilliant albums -A Rush Of Blood To The Head and Viva La Vida Or Death And All His Friends, which are two of my favorite albums ever. I didn't enjoy their 2011 album Mylo Xyloto, I did like their 2014 album Ghost Stories, but I have more mixed emotions on that one. Now they have a new album out, A Head Full Of Dreams, but I haven't had the opportunity to listen to it yet.
That being said, I do think Coldplay is a really good live band, and they will do well at the SB halftime show. I have seen them live and they were one of my favorite concerts.
I assume they'll stick to some more lively songs like this one (song starts at 3:50)
If they just stand up their and jam like that, they'll be the best SB halftime show since... well, Bruno Mars.