Knights and Dragons has a soft cap at 100 since the knights stops improving from that point. Only thing you get after lvl 100 is generally some ingame currency and gems (i think the "real" currency is called there) and the odd key. Its been month since I stoped playing Kinghts and Dragons, but I think there is a hardcap at 200 actually.
If they have the same aproach here, then at lvl 100 we stop getting more space for new fighter, more "space" to store activation points, and so forth. The only thing we will be getting is keys/Cash/ingame currency.