A chance to do friendly battles vs people in ur guild

Thanks for the input folks. Never give much thought to money only features. I spend like a $100 a year so nothing important but people like me might spend a bit more if we had more to do. I really would enjoy fighting guild mates for testing and bragging. Might even spend more to get a better team over a guild mate. I realize I'll never be a big arena contender just spending a little here and there but in my guild maybe. So it might make revenue...