Since the lasts price walls brings new characters from “Newest” series or films i think for bring some oldest characters do some temporary events that gives a bunch of characters, and do some tower with every x fights win you recieve 10 character chips for every character and when you beat It you recieve 500 red skill chips
F.E.
if they want to do more events (Like 1 event every 2 months) in a year they need to add less characters like 6 or 7
If they want to do few events (Like 1 event every season (4 in a year)) they add like 9 or 12 characters
And if they want to do less events (Like 1 every 6 months) they add like 15 or more characters
What do you think guys? Is a good idea or a worst idea??