As somebody who has had the privilege to work backstage for not only Spirit Song but numerous other concerts with these same bands headlining, if you have never went, or haven't been in a while, I STRONGLY recommend checking it out this year.
Though I've never seen Newsboys live, I've heard nothing but great things about their concerts and their great energy on stage.
TobyMac stole the night away last season with his amazing concert and I'm sure this year will be just as great, plus he will be coming fresh out of Winter Jam a couple months prior so it is definitely going to be fun to watch
I can't say enough about the production that Skillet puts on for each and every concert as they are always top notch, plus there may even be a chance they will be rolling out a new production and set this touring season but we will have to wait and see. Just a guess
I have seen Tenth Avenue North, Matthew West, We As Human, RED, and Newsong previously in concert at Winter Jam and all had amazing sets.
My church had the privilege of hosting Building 429 in concert back in August and words can't describe how great that concert turned out! That whole band and crew, just like all the others listed, are some of the greatest people you will ever meet, when it looks like they thrive off of crowd energy, it's because they really do because they care so much about their audiences.
All other bands, besides Petra, I have heard great things about all of their productions though I have never seen them live.
Like I said I strongly recommend checking it out this season after seeing this artist lineup. Spirit Song has become the highlight of the past two summers for me and it is something I always look forward to every year so if there is ever a year to go, this season is definitely one of them, and I know each and every band member and crew member, as well as everybody at KI would greatly appreciate seeing a packed house all three days!